Add configuration files and update project documentation

- Introduced .editorconfig for consistent coding styles across the project.
- Added .golangci.yml for Go linting configuration.
- Updated AGENTS.md to clarify project structure and components.
- Enhanced CONTRIBUTING.md with Makefile usage for common tasks.
- Updated Dockerfiles to use Go 1.24 and improved build instructions.
- Refined README.md and deployment documentation for clarity.
- Added testing documentation in testing.md for backend and frontend tests.
- Introduced Makefile for streamlined development commands and tasks.

frontend-nuxt/pages/login.vue

@@ -17,17 +17,17 @@
           <div class="divider text-sm">or</div>
         </div>
         <form @submit.prevent="submit" class="flex flex-col gap-4">
-          <div class="form-control">
+          <fieldset class="fieldset">
             <label class="label" for="user">User</label>
             <input
               id="user"
               v-model="user"
               type="text"
-              class="input input-bordered"
+              class="input"
               required
               autocomplete="username"
             />
-          </div>
+          </fieldset>
           <PasswordInput
             v-model="pass"
             label="Password"