docs(contributing): update first setup instructions

CONTRIBUTING.md

@@ -29,9 +29,12 @@
 git clone https://github.com/MTES-MCT/monitor-ui.git
 cd monitor-ui
 yarn
-yarn dev:setup # Install Git hooks
+yarn postinstall # Optional: automatically run each time Yarn cache is cleared
 ```
 
+> [!NOTE]  
+> You may have to manually run `yarn postinstall` to update post-install scripts when Yarn cache already exists.
+
 ### Local Development
 
 ```sh

package.json

@@ -18,13 +18,13 @@
     "build:type": "tsc -p ./tsconfig.dist.json",
     "clean": "yarn build:clean && rm -Rf ./node_modules/.cache && rm -Rf ./node_modules/.vite",
     "dev": "storybook dev --no-open -p 6006",
-    "dev:setup": "sh ./scripts/dev/setup.sh",
     "serve": "http-server ./storybook-static --port 3000 --silent",
     "start": "storybook dev -p 6006",
     "icons": "yarn icons:clean && yarn icons:generate && yarn icons:lint",
     "icons:clean": "rm -Rf ./src/icons && mkdir ./src/icons",
     "icons:generate": "node ./scripts/icons/generateIcons.js",
     "icons:lint": "echo 'Linting generated icons…' && yarn eslint --fix ./src/icons && echo 'Done.'",
+    "postinstall": "husky",
     "preview": "echo 'Linting generated icons…' && yarn eslint --fix ./src/icons && echo 'Done.'",
     "test": "yarn test:lint && yarn test:type",
     "test:e2e": "yarn cypress run --browser firefox --config-file ./config/cypress.config.ts --component",