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/main/database/migrations/032-browser-action-metadata.ts

@@ -0,0 +1,6 @@
+export const browserActionMetadataSchema = `
+  alter table browser_actions add column metadata_json text not null default '{}';
+
+  insert into schema_migrations(version, name, applied_at)
+  values (32, 'browser_action_metadata', datetime('now'));
+`;