[wiki migration] Framework team pages (flutter#148721)

This sorts the wiki pages owned by the Framework team in the docs/ directory as planned in [flutter.dev/go/migrate-flutter-wiki-spreadsheet](https://docs.google.com/spreadsheets/d/1x65189ZBdNiLRygpUYoU08pwvXD4M-Z157c6pm8deGI/edit?usp=sharing) 

It also adds the framework related labels to the bot for future PRs.

Changes to the content were only updating cross links. The remaining wiki links will be updated after the rest of the pages are relocated, the original wiki links still work in the meantime.

Part of flutter#145009

Author: Piinks

.github/labeler.yml

@@ -63,6 +63,7 @@ engine:
     - any-glob-to-any-file:
       - '**/cupertino/*'
       - '**/*cupertino*'
+      - docs/libraries/cupertino/**/*
 
 'f: focus':
   - changed-files:
@@ -81,6 +82,7 @@ engine:
     - any-glob-to-any-file:
       - '**/material/*'
       - '**/*material*'
+      - docs/libraries/material/**/*
 
 'f: routes':
   - changed-files:
@@ -110,6 +112,8 @@ framework:
       - packages/flutter_test/**/*
       - packages/integration_test/**/*
       - examples/api/**/*
+      - docs/contributing/**/*
+      - docs/libraries/**/*
 
 'f: integration_test':
   - changed-files:

docs/unsorted_wiki/The-Framework-architecture.md renamed to docs/about/The-Framework-architecture.md

@@ -57,8 +57,8 @@
 
 Next steps:
 
- * [[Running examples]], to see if your setup works.
- * [[The flutter tool]], to learn about how the `flutter` command line tool works.
- * [[Style guide for Flutter repo]], to learn how to write code for Flutter.
- * [[Tree hygiene]], to learn about how to submit patches.
- * [[Signing commits]], to configure your environment to securely sign your commits.
+ * [Running examples](https://github.com/flutter/flutter/wiki/Running-examples), to see if your setup works.
+ * [The flutter tool](https://github.com/flutter/flutter/wiki/The-flutter-tool), to learn about how the `flutter` command line tool works.
+ * [Style guide for Flutter repo](https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo), to learn how to write code for Flutter.
+ * [Tree hygiene](https://github.com/flutter/flutter/wiki/Tree-hygiene), to learn about how to submit patches.
+ * [Signing commits](https://github.com/flutter/flutter/wiki/Signing-commits), to configure your environment to securely sign your commits.

docs/unsorted_wiki/Setting-up-the-Framework-development-environment.md renamed to docs/contributing/Setting-up-the-Framework-development-environment.md

@@ -227,4 +227,4 @@ When writing tests, think about the developer who will read this test 6 months f
 
 # See also
 
-- [[Flutter Test Fonts]]
+- [Flutter Test Fonts](https://github.com/flutter/flutter/wiki/Flutter-Test-Fonts)

docs/unsorted_wiki/Using-the-Dart-analyzer.md renamed to docs/contributing/Using-the-Dart-analyzer.md

@@ -157,10 +157,10 @@ The bulk of communication happens on [Discord].
 
 [flutter/flutter]: https://github.com/flutter/flutter
 [Flutter issues]: https://github.com/flutter/flutter/issues
-[TESTOWNERS]: https://github.com/flutter/flutter/blob/master/TESTOWNERS
+[TESTOWNERS]: https://github.com/flutter/flutter/blob/main/TESTOWNERS
 [flutter-hackers]: https://github.com/orgs/flutter/teams/flutter-hackers
-[new issue]: https://github.com/flutter/flutter/issues/new
-[new infra issue]: https://github.com/flutter/flutter/issues/new
+[new issue]: https://github.com/flutter/flutter/issues/new/choose
+[new infra issue]: https://github.com/flutter/flutter/issues/new?template=6_infrastructure.yml
 
 [Framework build dashboard]: https://flutter-dashboard.appspot.com/#/build
 [framework benchmarks]: https://flutter-flutter-perf.skia.org/e/

docs/unsorted_wiki/Test-coverage-for-package-flutter.md renamed to docs/contributing/testing/Test-coverage-for-package-flutter.md

@@ -1,4 +1,4 @@
-The process to update the framework's Material fonts (currently, Roboto) and [icons](https://github.com/flutter/flutter/blob/master/packages/flutter/lib/src/material/icons.dart) has been largely simplified and automated. See [go/effortless-flutter-font-updates](http://go/effortless-flutter-font-updates) (Google-only, sorry). The steps used prior to automation are available in this page's history.
+The process to update the framework's Material fonts (currently, Roboto) and [icons](https://github.com/flutter/flutter/blob/main/packages/flutter/lib/src/material/icons.dart) has been largely simplified and automated. See [go/effortless-flutter-font-updates](http://go/effortless-flutter-font-updates) (Google-only, sorry). The steps used prior to automation are available in this page's history.
 
 If you notice an issue with fonts or icons (e.g. a missing icon), please file an [issue](https://github.com/flutter/flutter/issues/new/choose). Consider starting the issue title with `[Fonts]` or `[Icons]` to make it stand out.