docs: Add user guide for Corellium MVP (#1977)

Fixes #1976 

[User guide](https://github.com/Flank/flank/blob/1976_Add_user_guide_for_Corellium_MVP/docs/flank_corellium.md)

corellium/cli/src/main/kotlin/flank/corellium/cli/RunTestCorelliumAndroidCommand.kt

@@ -114,9 +114,9 @@ class RunTestCorelliumAndroidCommand :
 
 private fun defaultConfig() = Config().apply {
     project = "Default Project"
-    auth = "auth.yml"
+    auth = "corellium_auth.yml"
     apks = emptyList()
-    maxTestShards = 3
+    maxTestShards = 1
     localResultsDir = null
     obfuscate = false
 }

docs/flank_corellium.md

@@ -0,0 +1,181 @@
+# Flank - Corellium
+
+Run mobile tests in parallel on virtual devices driven by Corellium backend.
+
+## Status
+
+The Flank - Corellium integration is at the MVP stage, so only the core and most important features are available.
+
+[Read more](https://github.com/sparkrnyc/sparkr_general_docs/wiki/What-are-Prototype,-POC,-Alpha,-Beta-and-MVP#minimum-viable-product-mvp) about Minimum Viable Product.
+
+## Why Corellium
+
+Flank is just a client-side application that can prepare a time-efficient parallel test plan to run on several devices. It requires a third-party provider that can serve a huge amount of devices to run tests on them.   
+Corellium is solving this problem as follows:
+
+* Provides technology to virtualize mobile operating systems on servers powered by ARM cores. - This gives an incredible ability for scaling with regards to the amount of devices.
+* Gives access to the bare operating system (Android or iOS). - Which allows a run optimized sharding algorithm that improves test execution time and reduces costs.
+
+## How to get
+
+### The Latest build
+
+Flank - Corellium integration is built in the `flank.jar` executable, so the latest Flank build gives you access to the features driven on the Corellium backend.
+
+### Manual compilation
+
+Clone the repository and go to dir:
+
+```shell
+git clone [email protected]:Flank/flank.git
+cd flank
+```
+
+Build flank using flank-scripts (this method will give you access to `flank.jar` through `flank` shell command):
+
+```shell
+. .env
+flankScripts assemble flank
+```
+
+Or build directly using gradle command:
+
+```shell
+./gradlew :test_runner:build :test_runner:shadowJar
+```
+
+## How to run
+
+To call the root command for Corellium related features:
+
+locate your flank.jar in terminal and run:
+
+```bash
+flank.jar corellium
+```
+
+or if flank was build using `. .env && flankScripts assemble flank`, just type:
+
+```bash
+flank corellium
+```
+
+## Authorization
+
+To allow Flank working with Corellium backend is necessary to provide authentication data. By default, Flank is recognizing `corellium_auth.yml` as an authentication file, which should look as follows:
+
+```yaml
+host: your.corellium.backend.host
+username: your_username
+password: your_password
+```
+
+## Android test execution
+
+To execute android instrumented tests, run following command:
+
+```bash
+$ flank.jar corellium test android run -c="./flank_corellium.yml"
+```
+
+### Config
+
+The example configuration file looks following:
+
+```yaml
+
+### Test apks
+## The list of app and test apks.
+## Each app apk must have one or more corresponding test apks.
+apks:
+  - path: "app1.apk"
+    tests:
+      - path: "app1-test1.apk"
+  - path: "app2.apk"
+    tests:
+      - path: "app2-test1.apk"
+      - path: "app2-test2.apk"
+
+### Authorization file
+## Path to YAML file with host address and credentials.
+## default: corellium_auth.yml
+# auth: auth_file.yml
+
+### Project name
+## The name of Corellium project.
+## default: "Default project"
+# project: "project name"
+
+### Max Test Shards
+## test shards - the amount of groups to split the test suite into.
+## default: 1
+# max-test-shards: 10000
+
+### Results Directory
+## The name of a local directory where test results will be stored.
+## default: results/corellium/android/yyyy-MM-dd_HH-mm-ss-SSS
+# local-result-dir: test-results
+
+### Obfuscate dump
+## Replace internal test names with unique identifiers, before dumping them to "android-shards.json".
+## This option is hiding sensitive details about tests.
+## default: false
+# obfuscate: true
+```
+
+### Command-line arguments
+
+These can be included alongside the configuration file. They will override or supplement the configuration file depending on the usage.
+
+### Execution
+
+The test execution is composing small steps to fulfill operations like:
+
+* Calculating time-efficient sharding.
+* Preparing (creating or reusing) virtual devices for test execution.
+* Executing tests on prepared virtual devices.
+* Generating report.
+
+To learn more about the execution process check the:
+
+* [Architecture design](https://github.com/Flank/flank/blob/master/docs/architecture.md#domain-) - which is explaining some core abstract concepts.
+* [Corellium integration diagrams](https://github.com/Flank/flank/tree/master/corellium#flank---corellium) - to visualise relations and dependencies between layers.
+* [Domain module design & implementation](https://github.com/Flank/flank/tree/master/corellium/domain#flank---corellium---domain) - for detailed information about business logic and low-level implementation design.
+
+### Results
+
+The command execution process is generating different types of output.
+
+#### Console logs
+
+The process during its runtime is printing detailed information about execution steps to console log.
+
+#### Output files
+
+The successful run should generate the following files:
+
+* JUnitReport.xml
+* android_shards.json
+
+# Features
+
+* Calculating multi-module shards.
+* Creating or reusing instances (devices).
+* Installing APKs on remote devices.
+* Running android tests.
+* Dumping shards to file.
+* Parsing `adb am instrument` logs.
+* Generating JUnit report.
+
+# Roadmap
+
+* Cleaning devices after test execution.
+* Reusing test cases duration for sharding.
+* Flaky test detection.
+* Structural logging.
+* iOS support.
+* and much more...
+
+# Known bugs
+
+* Missing `<skipped/>` tag for skipped test cases in JUnit report 

mkdocs.yml

@@ -23,6 +23,7 @@ nav:
   - Building & updating Flank: building_updating_flank.md
   - Windows WSL: windows_wsl_guide.md
   - Cucumber: cucumber_support.md
+  - Corellium: flank_corellium.md
   - Contribution:
       - Pull request: pr_titles.md
   - Development: