feat(changelog): add changelog trickle down action

actions/trickle-down-changelog/.env.example

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+# Do not commit your actual .env file to Git! This may contain secrets or other
+# private information.
+
+# Enable/disable step debug logging (default: `false`). For local debugging, it
+# may be useful to set it to `true`.
+ACTIONS_STEP_DEBUG=true
+
+# GitHub Actions inputs should follow `INPUT_<name>` format (case-insensitive).
+# if you want to run locally, token needs to be inputted, just don't merge it :)
+INPUT_token=""
+
+# GitHub Actions default environment variables. These are set for every run of a
+# workflow and can be used in your actions. Setting the value here will override
+# any value set by the local-action tool.
+# https://docs.github.com/en/actions/learn-github-actions/variables#default-environment-variables
+
+# CI="true"
+# GITHUB_ACTION=""
+# GITHUB_ACTION_PATH=""
+# GITHUB_ACTION_REPOSITORY=""
+# GITHUB_ACTIONS=""
+# GITHUB_ACTOR="mona"
+# GITHUB_ACTOR_ID="123456789"
+# GITHUB_API_URL=""
+# GITHUB_BASE_REF=""
+# GITHUB_ENV=""
+# GITHUB_EVENT_NAME=""
+# GITHUB_EVENT_PATH=""
+# GITHUB_GRAPHQL_URL=""
+# GITHUB_HEAD_REF=""
+# GITHUB_JOB=""
+# GITHUB_OUTPUT=""
+# GITHUB_PATH=""
+# GITHUB_REF=""
+# GITHUB_REF_NAME=""
+# GITHUB_REF_PROTECTED=""
+# GITHUB_REF_TYPE=""
+# GITHUB_REPOSITORY=""
+# GITHUB_REPOSITORY_ID=""
+# GITHUB_REPOSITORY_OWNER=""
+# GITHUB_REPOSITORY_OWNER_ID=""
+# GITHUB_RETENTION_DAYS=""
+# GITHUB_RUN_ATTEMPT=""
+# GITHUB_RUN_ID=""
+# GITHUB_RUN_NUMBER=""
+# GITHUB_SERVER_URL=""
+# GITHUB_SHA=""
+# GITHUB_STEP_SUMMARY=""
+# GITHUB_TRIGGERING_ACTOR=""
+# GITHUB_WORKFLOW=""
+# GITHUB_WORKFLOW_REF=""
+# GITHUB_WORKFLOW_SHA=""
+# GITHUB_WORKSPACE=""
+# RUNNER_ARCH=""
+# RUNNER_DEBUG=""
+# RUNNER_NAME=""
+# RUNNER_OS=""
+# RUNNER_TEMP=""
+# RUNNER_TOOL_CACHE=""

actions/trickle-down-changelog/README.md

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+# Trickle Down Changelog GH Action
+
+This action will open PRs in downstream release branches with changes from the changelog.
+For example:
+
+- If you update the current GA branch with changes, you will also need to update beta branch and main branches.
+- This action will open PRs in beta and main branches with the changes from the changelog.
+
+## Inputs
+
+### `token`
+
+**Required** The GitHub token to use for authentication.
+
+## Usage
+
+```yaml
+jobs:
+	trickle-down-changelog:
+		runs-on: ubuntu-latest
+		steps:
+			- name: Checkout code
+			  uses: actions/checkout@v2
+			- name: Run action
+			  uses: elementor/elementor-pro/.github/actions/trickle-down-changelog@main
+			  with:
+				  token: ${{ secrets.GITHUB_TOKEN }}
+```
+
+## Build
+
+This action uses `tsup` to build the modules inside the javascript file, so no need to install any dependencies, **make sure to build before merging**.
+
+run `npm run build` to build the action. The build artifacts will be stored in the `dist/` directory.

actions/trickle-down-changelog/action.yml

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+name: 'Trickle down changelog action'
+description: 'Create PRs for changelog changes'
+inputs:
+    token:
+        description: 'GitHub token'
+        required: true
+
+runs:
+    using: node20
+    main: 'dist/index.js'