[wiki migration] Ecosystem team pages (#148589)

This puts the wiki pages owned by the Ecosystem team into the docs/ecosystem 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 ecosystem team labels to the label 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 https://github.com/flutter/flutter/issues/145009

.github/labeler.yml

@@ -116,6 +116,11 @@ framework:
     - any-glob-to-any-file:
       - packages/integration_test/**/*
 
+package:
+  - changed-files:
+    - any-glob-to-any-file:
+      - docs/ecosystem/**/*
+
 platform-ios:
   - changed-files:
     - any-glob-to-any-file:
@@ -138,6 +143,11 @@ platform-web:
       - '**/*.expect'
       - '**/*test_fixes*'
 
+team-ecosystem:
+  - changed-files:
+    - any-glob-to-any-file:
+      - docs/ecosystem/**/*
+
 tool:
   - changed-files:
     - any-glob-to-any-file:

dev/bots/analyze.dart

@@ -1312,6 +1312,7 @@ Future<void> verifyRepositoryLinks(String workingDirectory) async {
     'flutter/flutter-intellij', // TODO(guidezpl): remove when https://github.com/flutter/flutter-intellij/issues/7342 is closed
     'flutter/platform_tests', // TODO(guidezpl): remove when subtask in https://github.com/flutter/flutter/issues/121564 is complete
     'glfw/glfw',
+    'GoogleCloudPlatform/artifact-registry-maven-tools',
     'material-components/material-components-android', // TODO(guidezpl): remove when https://github.com/material-components/material-components-android/issues/4144 is closed
     'torvalds/linux',
     'tpn/winsdk-10',

docs/ecosystem/README.md

@@ -0,0 +1,12 @@
+This is an index of team-facing documentation for the [flutter/packages repository](https://github.com/flutter/packages/).
+
+- [Contributing to Plugins and Packages](contributing/README.md)
+- [Flutter migrate](https://github.com/flutter/flutter/wiki/Flutter-migrate)
+- [Package migration to 1.0.0](Package-migration-to-1.0.0.md)
+- [Plugin Tests](testing/Plugin-Tests.md)
+- [Plugins and Packages repository structure](Plugins-and-Packages-repository-structure.md)
+- [Setting up the Packages development environment](contributing/Setting-up-the-Packages-development-environment.md)
+- [Setting up the Plugins development environment](contributing/Setting-up-the-Plugins-development-environment.md)
+- [Understanding Packages tests](testing/Understanding-Packages-tests.md)
+- [Releasing a Plugin or Package](release/README.md)
+- [Updating Packages repo for a stable release](release/Updating-Packages-repo-for-a-stable-release.md)

docs/ecosystem/release/README.md

@@ -1,7 +1,7 @@
 Any PR that changes a package's version (which should be most PRs) should be published
 to pub.dev.
 
-_See also: [[Package migration to 1.0.0]]_
+_See also: [Package migration to 1.0.0](../Package-migration-to-1.0.0.md)
 
 ## Automatic release
 

docs/ecosystem/testing/Understanding-Packages-tests.md

@@ -16,7 +16,7 @@ flutter/packages uses the same LUCI infrastructure as most of the rest of Flutte
 
 ### LUCI
 
-This is the CI system used by flutter/flutter and flutter/engine. For information about LUCI results pages, see [[Understanding a LUCI build failure]].
+This is the CI system used by flutter/flutter and flutter/engine. For information about LUCI results pages, see [Understanding a LUCI build failure](https://github.com/flutter/flutter/wiki/Understanding-a-LUCI-build-failure).
 
 #### Results
 

docs/unsorted_wiki/Packages-repo.md

@@ -1,12 +0,0 @@
-This is an index of team-facing documentation for the [flutter/packages repository](https://github.com/flutter/packages/).
-
-- [[Contributing to Plugins and Packages]]
-- [[Flutter migrate]]
-- [[Migrating Plugins repository PRs to Packages]]
-- [[Package migration to 1.0.0]]
-- [[Plugin Tests]]
-- [[Plugins and Packages repository structure]]
-- [[Setting up the Packages development environment]]
-- [[Understanding Packages tests]]
-- [[Releasing a Plugin or Package]]
-- [[Updating Packages repo for a stable release]]