Refactor project structure and update configurations. Now first working version

- Updated `.air.conf` for Nix compatibility and simplified build commands.
- Enhanced `.gitignore` to include `tmp` directory.
- Improved `README.md` with clearer instructions and added language details.
- Refined CSS styles for better UI consistency and added alert styles.
- Upgraded `flake.nix` to use Go 1.24 and improved shell environment setup.
- Modified authentication logic in `auth.go` for better user handling.
- Updated `main.go` to dynamically set the listening port and improved logging.
- Added new `routes.go` file for handling game entry and history.
- Enhanced user models and added statistics tracking in `models.go`.
- Improved template rendering and added user feedback messages in HTML templates.
- Removed obsolete build error logs and binaries.

templates/user.html

@@ -2,7 +2,7 @@
 <div class="card">
     <h2>@{{.Viewed.Username}}</h2>
     <p class="small">Joined {{fmtTime .Viewed.CreatedAt}}</p>
-    <p>Games played: {{.Stats.Games}} Wins: {{.Stats.Wins}} Losses: {{.Stats.Losses}}</p>
+    <p>Game score {{.Stats.Games}}/{{.Stats.Wins}}/{{.Stats.Losses}}</p>
     {{if .Own}}
     <hr>
     <h3>Update your profile</h3>