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.

src/shared/provider-policy-domain.ts

@@ -0,0 +1,14 @@
+type ValueOf<T> = T[keyof T];
+
+export const PROVIDER_DATA_POLICY = {
+  STANDARD: "standard",
+  ZERO_DATA_RETENTION: "zero_data_retention",
+} as const;
+
+export const PROVIDER_EXECUTION_MODE = {
+  FOREGROUND: "foreground",
+  BACKGROUND: "background",
+} as const;
+
+export type ProviderDataPolicy = ValueOf<typeof PROVIDER_DATA_POLICY>;
+export type ProviderExecutionMode = ValueOf<typeof PROVIDER_EXECUTION_MODE>;