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/services/composio/composio-credentials.ts

@@ -0,0 +1,32 @@
+import { existsSync, readFileSync } from "node:fs";
+import { join } from "node:path";
+import type { DatabaseSync } from "node:sqlite";
+
+/**
+ * The org's Composio API key. When the database has none, a developer
+ * credential file next to the app (cred.txt, first line "Composio apikey:
+ * ak_...", gitignored) seeds it once for this org — the product owner's
+ * local path. Packaged installs configure the key in Settings instead; a
+ * missing file simply yields null.
+ */
+export function resolveComposioApiKey(db: DatabaseSync, orgId: string, credentialFileDir: string = process.cwd()): string | null {
+  const stored = db.prepare(
+    "select value from composio_settings where org_id = ? and key = 'api_key' limit 1",
+  ).get(orgId) as { value: string } | undefined;
+  if (stored?.value) return stored.value;
+
+  const path = join(credentialFileDir, "cred.txt");
+  if (!existsSync(path)) return null;
+  const firstLine = readFileSync(path, "utf8").split("\n")[0] ?? "";
+  const key = firstLine.split(":").slice(1).join(":").trim();
+  if (!key) return null;
+
+  const now = new Date().toISOString();
+  const upsert = db.prepare(`
+    insert into composio_settings(org_id, key, value, updated_at) values (?, ?, ?, ?)
+    on conflict(org_id, key) do update set value = excluded.value, updated_at = excluded.updated_at
+  `);
+  upsert.run(orgId, "api_key", key, now);
+  upsert.run(orgId, "entity_id", orgId, now);
+  return key;
+}