Adding Kotlin Multiplatform support with a Compiler plugin

[gmazzo]

Now the plugin is split into 3, each one providing a different set of features and targeting different use cases:

1. The io.github.gmazzo.codeowners plugin adds a Gradle report of classes' ownership
2. The io.github.gmazzo.codeowners.jvm plugin propagates the classes' ownership information to runtime. It supports any JVM build (java, groovy, etc) that produces .class files, but JVM-only
3. The io.github.gmazzo.codeowners.kotlin Kotlin Compiler plugin propagates the classes' ownership information to runtime. It supports any Kotlin build (jvm, android, multiplatform, etc, but Kotlin-only)

[codecov]

Codecov Report

Attention: 13 lines in your changes are missing coverage. Please review.

Comparison is base (80a249a) 78.40% compared to head (768d8c6) 76.79%.
Report is 2 commits behind head on main.

❗ Current head 768d8c6 differs from pull request most recent head 26dec61. Consider uploading reports for the commit 26dec61 to get more accurate results

Files	Patch %	Lines
...hub/gmazzo/codeowners/matcher/CodeOwnersMatcher.kt	0.00%	10 Missing ⚠️
...io/github/gmazzo/codeowners/CodeOwnersJVMPlugin.kt	85.71%	2 Missing ⚠️
...tlin/io/github/gmazzo/codeowners/CodeOwnersTask.kt	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #46      +/-   ##
============================================
- Coverage     78.40%   76.79%   -1.62%     
+ Complexity       51       39      -12     
============================================
  Files             7        7              
  Lines           389      349      -40     
  Branches         64       57       -7     
============================================
- Hits            305      268      -37     
- Misses           59       63       +4     
+ Partials         25       18       -7     

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