Add status badges and MIT license

- Add comprehensive status badges to README:
  - CI build status
  - Code coverage (Codecov)
  - Python version support (3.9+)
  - MIT license badge
  - Code style indicators (Black, Ruff)
  - Pre-commit hooks status
  - Helm plugin identification
- Add MIT license file

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

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

Author: ritwik-g

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Zipstack
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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 # helm-values-manager
 
+[![CI](https://github.com/Zipstack/helm-values-manager/workflows/CI/badge.svg)](https://github.com/Zipstack/helm-values-manager/actions/workflows/ci.yml)
+[![codecov](https://codecov.io/gh/Zipstack/helm-values-manager/branch/main/graph/badge.svg)](https://codecov.io/gh/Zipstack/helm-values-manager)
+[![Python Version](https://img.shields.io/badge/python-3.9%2B-blue.svg)](https://python.org)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
+[![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
+[![Pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white)](https://github.com/pre-commit/pre-commit)
+[![Helm Plugin](https://img.shields.io/badge/helm-plugin-blue.svg)](https://helm.sh/docs/topics/plugins/)
+
 A Helm plugin that helps manage Helm value configurations across different deployments (dev, test, prod) with a schema-driven approach. It separates value definitions (schema) from actual values, enabling vendors to distribute schemas while customers manage their deployment-specific values securely.
 
 ## Features