docs: add release notes for v1.3.0

Author: pedrobrantes

.github/releases/1.3.0.md

@@ -0,0 +1,25 @@
+### 📝 Release Notes v1.3.0
+
+#### 🚀 Testing Infrastructure & Security (Python Migration)
+This release introduces a complete overhaul of the testing system, migrating from Shell Script to **Python + Pytest**, delivering improved speed and robustness.
+
+*   **Mandatory Validation:** The `switch.sh` script now automatically runs the test suite before applying any changes. If tests fail, the deployment is aborted.
+*   **Test Enforcement:** The system now prevents the build if a new module is added to `programs/` without a corresponding test file (`.py`).
+*   **Performance:** The new architecture builds the Nix configuration only once for the entire test session, drastically reducing execution time in CI and locally.
+*   **Native CI/CD:** Replaced the Docker-based pipeline with native Nix GitHub Actions (`nix-shell`), aligning the CI environment with local development.
+
+#### ✨ New Features & Tools
+New packages have been integrated into the environment:
+
+*   **nh (Nix Helper):** Utility to simplify common Nix commands.
+*   **Ollama:** Tool for running LLMs locally.
+*   **Magic Wormhole:** Secure and easy file transfer (`wormhole-rs`).
+*   **OpenSSH:** SSH client configuration and installation.
+
+#### 🐛 Fixes & Improvements
+*   **CI Compatibility:** Added a generic `x86_64.linux.desktop` target to ensure CI (Ubuntu) can validate the build correctly.
+*   **fd:** Removed redundant alias that conflicted with the binary name.
+
+#### 🚜 Maintenance
+*   Renamed `nix_tests` directory to `tests`.
+*   Updated documentation (`README`, `DEVELOPMENT`) to reflect the new Python workflow.