Promote AgentCompany-New to the repository root and retire the old app

The legacy application - its src, tests, landing site, promo assets, docs,
release tooling, CI workflows, and root configs - leaves the tree; it stays
reachable in history. Everything under AgentCompany-New moves up unchanged:
same package name, so the production userData/database path is untouched,
and e2e/build scripts already resolved paths relative to the project. The
developer cred.txt stays gitignored at its new location. Full verify:ci
passes from the new root.

landing/functions/types.ts

@@ -1,17 +0,0 @@
-export interface CounterDbStatement {
-  bind(...values: unknown[]): {
-    first<T = unknown>(): Promise<T | null>;
-    run(): Promise<unknown>;
-  };
-}
-
-export interface CounterDatabase {
-  prepare(query: string): CounterDbStatement;
-}
-
-export interface PagesHandlerContext<Env> {
-  request: Request;
-  env: Env;
-}
-
-export type PagesHandler<Env> = (context: PagesHandlerContext<Env>) => Response | Promise<Response>;