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/vitest.config.ts

@@ -0,0 +1,16 @@
+import { defineConfig } from 'vitest/config'
+import { resolve } from 'path'
+
+export default defineConfig({
+  test: {
+    environment: 'happy-dom',
+    include: ['**/__tests__/**/*.test.ts', '**/*.test.ts'],
+    globals: true,
+  },
+  resolve: {
+    alias: {
+      '~': resolve(__dirname, '.'),
+      '#imports': resolve(__dirname, './__mocks__/nuxt-imports.ts'),
+    },
+  },
+})