Developer docs begin - precommit

Developers.md

@@ -0,0 +1,21 @@
+Developers
+
+Install pre-commit (https://pre-commit.com/)
+
+```bash
+pip install pre-commit
+```
+
+Check that it's installed
+
+```bash
+pre-commit --versioni
+```
+
+This repository already has a pre-commit configuration. To install the hooks, run:
+
+```bash
+pre-commit install
+```
+
+Now when you make a git commit, the black code formatter and ruff linter will run.

requirements.txt

@@ -73,4 +73,6 @@ rich
 
 mkdocs
 mkdocs-material
-mkdocs-glightbox
+mkdocs-glightbox
+
+pre-commit