Make react-native-bot print the pick criterias on every new pick (#730)

Author: cortinico

.github/workflows/pick-request-hello-message.md

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+Thank you for opening a new pick-request for React Native.
+Those are the criterias we follow when accepting/rejecting a pick request ([source](https://github.com/reactwg/react-native-releases/blob/main/docs/support.md)).
+
+If your pick does not satisfy the criteria below, please close it as it will not be considered.
+
+<details>
+<summary>✅ Which pick requests we accept</summary>
+
+1. ✅ Fixes for regressions to core APIs. Examples:
+    * A core component is behaving differently between version 0.X and 0.X-1
+    * The TurboModule.getEnforcing function is throwing an assertion error which is not expected.
+2. ✅ Fixes to bugs in the core React Native’s experience. Examples:
+    * Breakpoints in React Native DevTools not working correctly in the debugger
+    * Fast Refresh not working as expected
+    * Metro bundler not starting properly or ignoring the configuration file
+    * Buttons that are not clickable
+3. ✅ Fixes to APIs used by 3P libraries and Out-of-tree platforms. Examples:
+    * An API that is used by `react-native-macos` is not behaving as expected or regressing
+4. ✅ Bump of patch version of dependencies. Example:
+    * Bump Gradle from 8.11.0 to 8.11.1
+5. ✅ Fixes for Low/High Security Vulnerability. Example:
+    * Bump Gradle from 8.11.0 to 8.12.0 if there is a security vulnerability in 8.11 and there is no version 8.11.x which would contain the same fix.
+6. ✅ Fixes and reverts of accidental breaking changes. Example:
+    * Reverting or fix-forwarding a migration to Kotlin of a file (say `ReactRootView.java` ) if that is causing a breaking change for the whole React Native ecosystem.
+7. ✅ Performance improvements picks. Examples:
+    * Fixing unnecessary rendering on FlatList.
+8. ✅ Any pick if the release is still in RC0 (after RC1 the previous listed criteria applies)
+</details>
+
+<details>
+<summary>❌ Which pick requests we don’t accept</summary>
+
+9. ❌ Any pick that will introduce a breaking change after RC1. Example:
+    * A bugfix that contains a refactoring, resulting in changes to the public API of a class
+10. ❌ Any pick that introduces a new feature after RC1. Example:
+    * A commit that introduces a new API or a specific feature for a component.
+11. ❌ Bump of major/minor version of dependencies. Example:
+    * Bump Gradle from 8.11.0 to 8.12.0
+    * Bump Gradle from 8.11.0 to 9.0.0
+12. ❌Bump of a dependency to a non stable/alpha/beta version. Example:
+    * Bump Gradle from 8.11.0 to 8.11.1-beta.1
+13. ❌Any pick that introduces changes to the testing infrastructure of React Native after RC1. Examples:
+    * Changes to the GitHub Actions workflows to optimize it, even if they’re on main.
+    * Changes to the logic used to publish packages to NPM or Maven Central
+14. ❌ Pick composed by various commits that has several merge conflicts
+    * If your pick is too complicated to apply on the release branch, we’re going to reject it.
+15. ❌ Any other non-critical improvement that landed on main.
+    * In general those will ship in the following version unless they fit in one of the criteria above
+16. ❌ Any other pick which is considered “small enough” to make it into a release.
+    * If your pick is a one liner but is a ‘nice to have’, we won’t be picking it, as it has the risk of destabilizing the release and further delaying the release.
+</details>
+
+<details>
+<summary>ℹ️ What makes for a good pick</summary>
+
+In order for your pick to be considered, please do the following:
+
+* ℹ️ Have a pick that contains only one commit from `main`, or only one PR against the release branch.
+* ℹ️ Have a clear explanation of why your pick should be considered, ideally referencing one of the criteria above.
+* ℹ️ Target only one minor version of React Native (e.g. [0.76]). If you want your pick to be applied to more versions, please open different picks.
+</details>

.github/workflows/respond-on-new-pick-request.yml

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+name: Respond on New Pick Request
+on:
+  issues:
+    types: [labeled]
+jobs:
+  publish-message:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Publish Message
+        uses: actions/github-script@v6
+        if: github.event.label.name == 'Type Pick Request'
+        env:
+          GITHUB_TOKEN: ${{ secrets.REACT_NATIVE_BOT_REACT_WG_REACT_NATIVE_RELEASES_TOKEN }}
+          MESSAGE: $(cat ./pick-request-hello-message.md)
+        with: 
+          script: |
+            github.issues.createComment({
+              issue_number: github.context.issue.number,
+              owner: github.context.repo.owner,
+              repo: github.context.repo.repo,
+              body: "${MESSAGE}"
+            })