feat(01-01): initialize Next.js 16 project with TypeScript and Tailwind

- Next.js 16.1.6 with App Router and src/ directory
- TypeScript configuration with path aliases (@/*)
- Tailwind CSS v4 with PostCSS setup
- ESLint with Next.js config
- Supabase packages: @supabase/supabase-js, @supabase/ssr
- Form packages: zod, react-hook-form
- Simple Leopost placeholder page

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitattributes

@@ -0,0 +1,24 @@
+# Auto detect text files and perform LF normalization
+* text=auto
+
+# Force LF for scripts (importante per VPS Linux)
+*.sh text eol=lf
+*.bash text eol=lf
+deploy.sh text eol=lf
+
+# Force LF for config files
+*.yml text eol=lf
+*.yaml text eol=lf
+*.json text eol=lf
+*.md text eol=lf
+
+# Binary files
+*.png binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.ico binary
+*.woff binary
+*.woff2 binary
+*.ttf binary
+*.eot binary