Add tsp-client local spec development docs (#1793)

Adding docs to explain the local development scenario for folks who
havent checked a spec in yet or who want to work on local changes and
generate a client library based on those updates.

---------

Co-authored-by: Catalina Peralta <[email protected]>
Co-authored-by: Timothee Guerin <[email protected]>

website/src/content/docs/docs/howtos/Generate with tsp-client/local_spec_quickstart.md

@@ -0,0 +1,42 @@
+---
+title: Quick Start
+---
+
+`tsp-client` allows you to develop your TypeSpec project locally before pushing changes upstream. These instructions can be used when you want to generate a client library from a local TypeSpec project that has the changes you wish to use.
+
+### Prerequisites
+
+- Install `tsp-client`:
+
+```bash
+npm install -g @azure-tools/typespec-client-generator-cli
+```
+
+- Have a local Git repository with your TypeSpec project. We'll use the `azure-rest-api-specs` repository in examples.
+- Have a clone of an `azure-sdk-for-<language>` repository. We'll use `azure-sdk-for-python` in examples.
+
+### Generate a client library from local changes
+
+1. Go to local `azure-rest-api-specs` clone.
+2. Create/Modify the TypeSpec project.
+3. Switch to the language repository clone you want to generate a client library in. Example:
+
+```bash
+cd <path to>/azure-sdk-for-python
+```
+
+4. From the root of the repository run the following command:
+
+```bash
+azure-sdk-for-python> tsp-client init -c <path to local typespec project at tspconfig.yaml level>
+```
+
+Example:
+
+```bash
+azure-sdk-for-python> tsp-client init -c ../azure-rest-api-specs/specification/contosowidgetmanager/Contoso.WidgetManager/
+```
+
+:::info
+To get familiar with `tsp-client` and supported commands, see [tsp-client usage](https://aka.ms/azsdk/tsp-client).
+:::

website/src/content/docs/docs/howtos/Generate with tsp-client/tsp_client.md

@@ -1,5 +1,5 @@
 ---
-title: tsp-client usage
+title: Usage & Configuration
 ---
 
 :::info