chore: add git hook installer

Justfile

@@ -5,6 +5,16 @@
 default:
     @just --list
 
+# Install local development tooling.
+install: install-git-hooks
+
+# Install Git hooks for this repository.
+install-git-hooks:
+    @mkdir -p .git/hooks
+    @printf '%s\n' '#!/bin/sh' '' 'just check' > .git/hooks/pre-push
+    @chmod +x .git/hooks/pre-push
+    @printf '%s\n' 'Installed .git/hooks/pre-push'
+
 # Lint all Lua source with luacheck.
 check:
     luacheck .

README.md

@@ -1,5 +1,19 @@
 # Trap's ComputerCraft APIs
 
+## Development
+
+Requirements:
+- `just`
+- `luacheck`
+
+After cloning the repository, run:
+
+```
+just install
+```
+
+This installs the local Git hooks, including a pre-push hook that runs `just check`.
+
 ## Installation
 ```
 wget run https://raw.githubusercontent.com/guillaumearm/cc-libs/master/install.lua