Feat/add husky (#223)

# Add Husky and lint-staged for automated code quality checks

## Description
This PR adds Husky Git hooks and lint-staged to automate code quality
checks during the development workflow.

## Features Added
- Pre-commit hook that runs lint-staged to check files before committing
- Pre-push hook that runs tests and type checking before pushing
- Configuration for lint-staged to format and lint different file types
- Documentation explaining the Husky setup and usage
- Updated README.md with information about Git hooks

## Benefits
- Ensures consistent code style across the project
- Prevents pushing code with failing tests or type errors
- Reduces the need for style-related code review comments
- Improves overall code quality

## Implementation Details
- Added Husky and lint-staged as dev dependencies
- Created pre-commit and pre-push hooks
- Added configuration for lint-staged
- Added documentation in HUSKY.md
- Updated README.md with a new section on Git hooks

## Testing
The hooks have been tested locally and work as expected:
- Pre-commit hook runs ESLint and Prettier on staged files
- Pre-push hook runs tests and type checking

I have read the CLA Document and I hereby sign the CLA

---------

Signed-off-by: Alpha Diop <alphakhoss@gmail.com>

codex-cli/.husky/_/husky.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env sh
+if [ -z "$husky_skip_init" ]; then
+  debug () {
+    if [ "$HUSKY_DEBUG" = "1" ]; then
+      echo "husky (debug) - $1"
+    fi
+  }
+
+  readonly hook_name="$(basename -- "$0")"
+  debug "starting $hook_name..."
+
+  if [ "$HUSKY" = "0" ]; then
+    debug "HUSKY env variable is set to 0, skipping hook"
+    exit 0
+  fi
+
+  if [ -f ~/.huskyrc ]; then
+    debug "sourcing ~/.huskyrc"
+    . ~/.huskyrc
+  fi
+
+  readonly husky_skip_init=1
+  export husky_skip_init
+  sh -e "$0" "$@"
+  exitCode="$?"
+
+  if [ $exitCode != 0 ]; then
+    echo "husky - $hook_name hook exited with code $exitCode (error)"
+  fi
+
+  exit $exitCode
+fi

codex-cli/.husky/pre-commit

@@ -0,0 +1,5 @@
+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+# Run lint-staged to check files that are about to be committed
+npm run pre-commit

codex-cli/.husky/pre-push

@@ -0,0 +1,5 @@
+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+# Run tests and type checking before pushing
+npm test && npm run typecheck