Add workflow_dispatch for version bump, release, and PyPI publish

Replace the release-triggered publish workflow with a manual
workflow_dispatch that bumps the version (major/minor/patch),
commits and tags the change, creates a GitHub release via gh CLI,
and publishes to PyPI.

Author: jaseemjaskp

.github/workflows/main.yml

@@ -1,21 +1,28 @@
-name: Publish Python Package
+name: Bump Version and Publish
 
 on:
-  release:
-    types:
-      - published
+  workflow_dispatch:
+    inputs:
+      version_type:
+        description: "Version bump type"
+        required: true
+        type: choice
+        options:
+          - patch
+          - minor
+          - major
 
 jobs:
-  pypi-publish:
-    name: upload release to PyPI
+  bump-version-and-publish:
+    name: Bump version, release, and publish to PyPI
     runs-on: ubuntu-latest
     permissions:
-      contents: read
+      contents: write
       id-token: write
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.release.tag_name }}
+          fetch-depth: 0
 
       - uses: actions/setup-python@v5
         with:
@@ -24,9 +31,49 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@v5
         with:
-          # Install a specific version of uv.
           version: "0.6.14"
 
+      - name: Bump version
+        id: bump
+        run: |
+          CURRENT_VERSION=$(python -c "import re; content=open('src/unstract/llmwhisperer/__init__.py').read(); print(re.search(r'__version__\s*=\s*\"(.+?)\"', content).group(1))")
+          IFS='.' read -r MAJOR MINOR PATCH <<< "$CURRENT_VERSION"
+
+          case "${{ github.event.inputs.version_type }}" in
+            major)
+              MAJOR=$((MAJOR + 1))
+              MINOR=0
+              PATCH=0
+              ;;
+            minor)
+              MINOR=$((MINOR + 1))
+              PATCH=0
+              ;;
+            patch)
+              PATCH=$((PATCH + 1))
+              ;;
+          esac
+
+          NEW_VERSION="${MAJOR}.${MINOR}.${PATCH}"
+          echo "old_version=$CURRENT_VERSION" >> "$GITHUB_OUTPUT"
+          echo "new_version=$NEW_VERSION" >> "$GITHUB_OUTPUT"
+
+          sed -i "s/__version__ = \"$CURRENT_VERSION\"/__version__ = \"$NEW_VERSION\"/" src/unstract/llmwhisperer/__init__.py
+
+      - name: Commit and tag
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add src/unstract/llmwhisperer/__init__.py
+          git commit -m "Bump version to v${{ steps.bump.outputs.new_version }}"
+          git tag "v${{ steps.bump.outputs.new_version }}"
+          git push origin main --tags
+
+      - name: Create GitHub Release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: gh release create "v${{ steps.bump.outputs.new_version }}" --generate-notes
+
       - name: Build package
         run: uv build