Adding the Changelog

Author: rafaelherik

CHANGELOG.md

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+# Changelog
+
+## [0.1.0] - 2024-06-05
+
+### 🎉 Project Reborn: tfsumpy 0.1.0
+
+This release marks a **new beginning** for tfsumpy. The project has been refocused and rebuilt to be a best-in-class Terraform plan summarizer, with a modern, extensible architecture.
+
+### Major Changes
+
+- **Simplified Core:**
+  - tfsumpy now focuses exclusively on summarizing Terraform plan files. All previous risk assessment and policy compliance features have been removed.
+  - The CLI and API are streamlined for clarity and ease of use.
+
+- **Extensible by Design:**
+  - tfsumpy now supports plug-and-play extensions via a simple plugin system. You can add your own analyzers and reporters by dropping Python files in a `plugins/` directory (or specify `--plugin-dir`).
+  - This makes it easy to add custom compliance checks, cost estimation, notifications, or integrations with other tools—without modifying the core codebase.
+
+### Why This Change?
+
+- **Focus:**
+  - By concentrating on plan summarization, tfsumpy is easier to use, maintain, and extend.
+- **Flexibility:**
+  - Users and organizations can now build their own extensions for any workflow or integration.
+- **Community:**
+  - We encourage sharing and contributing plugins to grow the ecosystem.
+
+### Migration & Support Notes
+
+- **Older releases are no longer supported.**
+  - The previous risk and policy features are not maintained and will not receive updates.
+  - If you need those features, consider implementing them as plugins using the new extension system.
+- **This is a fresh start.**
+  - We recommend all users upgrade to 0.1.0+ and take advantage of the new architecture.
+
+### How to Extend
+
+- See the [Extending tfsumpy](docs/extending.md) documentation for examples and best practices.
+- Write your own analyzer or reporter, place it in the `plugins/` directory, and tfsumpy will auto-load it.
+
+---
+
+## [Older releases]
+
+Older versions of tfsumpy are deprecated and will not be supported going forward. Please upgrade to 0.1.0+ for the latest features.