Add dev docs

docs/source/development/index.md

@@ -0,0 +1,34 @@
+# Development and contribution
+
+Thanks for your interest in improving batdetect2.
+
+## Ways to contribute
+
+- Report bugs and request features on
+  [GitHub Issues](https://github.com/macaodha/batdetect2/issues)
+- Improve docs by opening pull requests with clearer examples, fixes, or
+  missing workflows
+- Contribute code for models, data handling, evaluation, or CLI workflows
+
+## Basic contribution workflow
+
+1. Open an issue (or comment on an existing one) so work is visible.
+2. Create a branch for your change.
+3. Run checks locally before opening a PR:
+
+```bash
+just check
+just docs
+```
+
+4. Open a pull request with a clear summary of what changed and why.
+
+## Development environment
+
+Use `uv` for dependency and environment management.
+
+```bash
+uv sync
+```
+
+For more setup details, see {doc}`../getting_started`.