Add PyPI publish workflow and update README for non-PyPI installation

- Add GitHub Actions workflow for automated PyPI publishing on release
- Update README to show GitHub-based installation methods until PyPI is set up
- Remove references to direct pip install from PyPI
- Workflow uses trusted publishing (OIDC) for secure authentication

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: ritwik-g

.github/workflows/pypi-publish.yml

@@ -0,0 +1,34 @@
+name: Publish to PyPI
+
+on:
+  release:
+    types: [published]
+
+permissions:
+  contents: read
+  id-token: write
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code at release tag
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.release.tag_name }}
+      
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+      
+      - name: Install uv
+        uses: astral-sh/setup-uv@v5
+        with:
+          version: "0.5.14"
+      
+      - name: Build package
+        run: uv build
+      
+      - name: Publish to PyPI
+        run: uv publish

README.md

@@ -15,24 +15,26 @@ A Helm plugin that helps manage Helm value configurations across different deplo
 
 ### As a Standalone CLI Tool (Recommended)
 
-Install directly with pip:
+Install from GitHub:
 
 ```bash
-pip install helm-values-manager
+pip install git+https://github.com/Zipstack/helm-values-manager.git
 ```
 
-Or with uv:
+Or clone and install locally:
 
 ```bash
-uv add helm-values-manager
+git clone https://github.com/Zipstack/helm-values-manager
+cd helm-values-manager
+pip install -e .
 ```
 
-Or install from source:
+Or with uv:
 
 ```bash
 git clone https://github.com/Zipstack/helm-values-manager
 cd helm-values-manager
-uv install
+uv sync
 # CLI will be available as: uv run helm-values-manager
 ```