Add nightly release automation with GitHub Actions (#6041)

* Add nightly release automation with GitHub Actions

- Add GitHub workflow to publish nightly releases daily at 00:00 UTC
- Add publish:marketplace:nightly npm script
- Create publish-nightly.mjs script to handle version updates and publishing
- Script converts package to "cline-nightly" with timestamp-based versioning
- Publishes to both VS Code Marketplace and OpenVSX Registry

* Update file name

* Remove input tag

* Change nightly build schedule from midnight to 4 AM PST

- Change nightly build schedule from midnight to 4 AM PST
- Add check to skip build if no commits in last 24 hours
- Disable nightly extension in VS Code debug configs to avoid conflicts

* add if: github.repository == 'cline/cline'

.github/workflows/publish-nightly.yml

@@ -0,0 +1,73 @@
+name: "Publish Nightly Release"
+
+on:
+  schedule:
+    - cron: '0 12 * * *'  # 4 AM PST (UTC-8) = 12 UTC
+  workflow_dispatch:
+
+permissions:
+    contents: write
+    packages: write
+    checks: write
+    pull-requests: write
+
+jobs:
+    test:
+        uses: ./.github/workflows/test.yml
+
+    publish:
+        needs: test
+        name: Publish Cline (Nightly) Extension
+        if: github.repository == 'cline/cline'
+        runs-on: ubuntu-latest
+        environment: publish
+
+        steps:
+            - uses: actions/checkout@v4
+
+            - name: Check for recent commits
+              run: |
+                if [ $(git rev-list --count HEAD --since="24 hours ago") -eq 0 ]; then
+                  echo "No commits in last 24 hours, exiting"
+                  exit 0
+                fi
+                echo "Found recent commits, proceeding with build"
+                
+            - name: Setup Node.js
+              uses: actions/setup-node@v4
+              with:
+                  node-version: "lts/*"
+
+            # Cache root dependencies - only reuse if package-lock.json exactly matches
+            - name: Cache root dependencies
+              uses: actions/cache@v4
+              id: root-cache
+              with:
+                  path: node_modules
+                  key: ${{ runner.os }}-npm-${{ hashFiles('package-lock.json') }}
+
+            # Cache webview-ui dependencies - only reuse if package-lock.json exactly matches
+            - name: Cache webview-ui dependencies
+              uses: actions/cache@v4
+              id: webview-cache
+              with:
+                  path: webview-ui/node_modules
+                  key: ${{ runner.os }}-npm-webview-${{ hashFiles('webview-ui/package-lock.json') }}
+
+            - name: Install root dependencies
+              if: steps.root-cache.outputs.cache-hit != 'true'
+              run: npm ci --include=optional
+
+            - name: Install webview-ui dependencies
+              if: steps.webview-cache.outputs.cache-hit != 'true'
+              run: cd webview-ui && npm ci --include=optional
+
+            - name: Install Publishing Tools
+              run: npm install -g @vscode/vsce ovsx
+
+            - name: Publish Extension as Pre-release
+              env:
+                  VSCE_PAT: ${{ secrets.VSCE_PAT }}
+                  OVSX_PAT: ${{ secrets.OVSX_PAT }}
+                  CLINE_ENVIRONMENT: production
+              run: npm run publish:marketplace:nightly