Update project documentation and improve frontend functionality

- Updated the backend documentation in CONTRIBUTING.md and README.md to reflect changes in application structure and API endpoints.
- Enhanced the frontend components in MapView.vue for better handling of context menu actions.
- Added new types and interfaces in TypeScript for improved type safety in the frontend.
- Introduced new utility classes for managing characters and markers in the map.
- Updated .gitignore to include .vscode directory for better development environment management.

CONTRIBUTING.md

@@ -9,7 +9,7 @@ Clone the repository and run the project locally (see [Development](docs/develop
 
 ## Code layout
 
-- **Backend:** Entry point is `cmd/hnh-map/main.go`. All application logic lives in `internal/app/` (package `app`): `app.go` (App, types, routes, session helpers), `api.go`, `admin.go`, `client.go`, `map.go`, `tile.go`, `topic.go`, `manage.go`, `migrations.go`. The `webapp/` package in the repo root handles HTML template loading and execution.
+- **Backend:** Entry point is `cmd/hnh-map/main.go`. All application logic lives in `internal/app/` (package `app`): `app.go`, `auth.go`, `api.go`, `handlers_redirects.go`, `client.go`, `client_grid.go`, `client_positions.go`, `client_markers.go`, `admin_*.go`, `map.go`, `tile.go`, `topic.go`, `migrations.go`.
 - **Frontend:** Nuxt 3 app in `frontend-nuxt/` (pages, components, composables, layouts, server, plugins, `public/gfx`). It is served by the Go backend under `/map/` with baseURL `/map/`.
 
 ## Formatting and tests