Add GH workflows to automate adding pull requests and issues to organizational projects and convert the PR validation workflow to reusable (#196)

* Add GitHub Actions workflows to automate adding pull requests and issues to organizational projects.
Introduce this in the reusable workflow form to be able to use from from other projects to avoid code duplication.

* Fix PR Comment workflow when remark-lint was skipped

* Upload lint results for skipped validation

* Use pull_request_target event to allow forked PRs to be added to GH Projects

* Convert PR validation to reusable workflow for calling from other repositories

* Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Add required GitHub token for project automation in reusable workflow and update workflow reference to local path

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: dshevtsov

.github/workflows/add-to-project-board.yml

@@ -0,0 +1,16 @@
+##### Aggregate Commerce PRs and Issues into a respective Organizational Project #####
+
+name: Add pull requests and issues to projects
+
+on:
+  pull_request_target:
+    types:
+      - opened
+  issues:
+    types: 
+      - opened
+
+jobs:
+  call-workflow-add-to-project:
+    uses: ./.github/workflows/add-to-project_job.yml
+    secrets: inherit

.github/workflows/add-to-project_job.yml

@@ -0,0 +1,27 @@
+name: Add to project job
+
+on:
+  workflow_call:
+    secrets:
+      COMMERCE_PROJECT_AUTOMATION:
+        description: 'GitHub token for project automation'
+        required: true
+
+jobs:
+  add-to-project:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Add to Commerce PR project
+        if: github.event_name == 'pull_request_target'
+        uses: actions/add-to-project@v1.0.2
+        with:
+          project-url: https://github.com/orgs/AdobeDocs/projects/5 # The organizational project for pull requests
+          github-token: ${{ secrets.COMMERCE_PROJECT_AUTOMATION }}
+      
+      - name: Add to Commerce Issue project
+        if: github.event_name == 'issues'
+        uses: actions/add-to-project@v1.0.2
+        with:
+          project-url: https://github.com/orgs/AdobeDocs/projects/6 # The organizational project for issues
+          github-token: ${{ secrets.COMMERCE_PROJECT_AUTOMATION }}

.github/workflows/pr-comment.yml

@@ -2,7 +2,7 @@
 name: PR Comment
 on:
   workflow_run:
-    workflows: ["Validate pull request"]
+    workflows: ["PR validation"]
     types:
       - completed
 

.github/workflows/pr-validation.yml

@@ -0,0 +1,12 @@
+---
+name: PR validation
+on:
+  pull_request:
+
+jobs:
+  validate:
+    uses: ./.github/workflows/validate-pr.yml
+    with:
+      pr_number: ${{ github.event.pull_request.number }}
+      base_ref: ${{ github.event.pull_request.base.ref }}
+

.github/workflows/validate-pr.yml

@@ -1,7 +1,16 @@
 ---
 name: Validate pull request
 on:
-  pull_request:
+  workflow_call:
+    inputs:
+      pr_number:
+        description: 'Pull request number'
+        required: true
+        type: number
+      base_ref:
+        description: 'Base branch reference'
+        required: true
+        type: string
 
 jobs:
   # Check if src/pages files were changed
@@ -18,8 +27,8 @@ jobs:
       - name: Check for src/pages changes
         id: filter
         run: |
-          git fetch origin ${{ github.base_ref }}
-          CHANGED_FILES=$(git diff --name-only origin/${{ github.base_ref }}...HEAD)
+          git fetch origin ${{ inputs.base_ref }}
+          CHANGED_FILES=$(git diff --name-only origin/${{ inputs.base_ref }}...HEAD)
           if echo "$CHANGED_FILES" | grep -q "^src/pages/"; then
             echo "run_validation=true" >> $GITHUB_OUTPUT
             echo "✅ Changes detected in src/pages/"
@@ -99,7 +108,7 @@ jobs:
             
             # Save warning status for the comment workflow
             echo "true" > has-warnings.txt
-            echo "${{ github.event.pull_request.number }}" > pr-number.txt
+            echo "${{ inputs.pr_number }}" > pr-number.txt
           else
             echo "✅ **No issues found!**" >> $GITHUB_STEP_SUMMARY
             echo "" >> $GITHUB_STEP_SUMMARY
@@ -108,7 +117,7 @@ jobs:
             
             # Save no-warning status
             echo "false" > has-warnings.txt
-            echo "${{ github.event.pull_request.number }}" > pr-number.txt
+            echo "${{ inputs.pr_number }}" > pr-number.txt
           fi
 
       - name: Upload lint results
@@ -131,6 +140,8 @@ jobs:
           # If no src/pages files changed, pass automatically
           if [[ "${{ needs.check-files.outputs.run_validation }}" == "false" ]]; then
             echo "✅ No src/pages/ files changed - validation skipped"
+            echo "false" > has-warnings.txt
+            echo "${{ inputs.pr_number }}" > pr-number.txt
             exit 0
           fi
           
@@ -147,3 +158,12 @@ jobs:
             echo "Remark Lint: ${{ needs.remark-lint.result }}"
             exit 1
           fi
+
+      - name: Upload lint results for skipped validation
+        if: needs.check-files.outputs.run_validation == 'false'
+        uses: actions/upload-artifact@v4
+        with:
+          name: lint-results
+          path: |
+            has-warnings.txt
+            pr-number.txt