Configuring Release-Please to create releases for Apps / Packages

[pedrorezende]

This PR improves the whole CI for the namada-interface monorepo. The main changes are listed below:

• Release Please runs when any PR is merged to main, creating chore PRs bumping the version of the following packages: apps/namadillo, apps/extension, package/sdk, package/types
• When the version PR is merged to main, Release Please creates a new release containing the changelog + built files for every package changed.
• Refactored some actions to reuse some code
• We won't run Firefox build anymore after a new PR is open, only on the release process

Testing this PR

There's no straightforward way to fully test this PR. I was working in a temporary test branch with some main changes I list below. Forks won't work.

1. On release-please-config.json , add "draft": true to the config.
2. On .github/workflows/release.yml , change main to the name of the test branch and also add the following config release-please-action:

    steps:
      - uses: googleapis/release-please-action@v4
        id: release
+        with:
+         target-branch: name-of-your-test-branch

3. Release please will probably create a bunch of new PRs, so take some care with that if you want to test

Next Steps

• Automatically release packages to NPM registry
• Notify new releases on Discord

[euharrison]

Awesome! ✅