refactor: improve code structure and add better logging

- Replace custom logger with @atums/echo library
- Restructure imports using # path aliases
- Add request performance tracking and better request logging
- Improve type definitions and error handling
- Add custom file serving capability
- Update biome configuration with stricter linting rules
- Add comprehensive API documentation (DOCS.md)

types/routes.ts

@@ -0,0 +1,22 @@
+import type { Server } from "bun";
+
+type RouteDef = {
+	method: string;
+	accepts: string | null;
+	returns: string;
+	needsBody?: "multipart" | "json";
+};
+
+type Query = Record<string, string>;
+type Params = Record<string, string>;
+
+type RouteModule = {
+	handler: (
+		request: Request,
+		server: Server,
+		requestBody: unknown,
+	) => Promise<Response> | Response;
+	routeDef: RouteDef;
+};
+
+export type { RouteDef, Query, Params, RouteModule };