refactor: rename API and frontend projects to Vocero

Rename the project directories, Python distribution and import package, and npm package. Update launcher, Docker, tooling, tests, lockfiles, and documentation while preserving existing API contracts.

Make AGENTS.md self-contained and remove external skill and workflow references.

vocero-api/vocero_api/main.py

@@ -0,0 +1,25 @@
+"""Assemble the client API and retain its existing documentation URLs."""
+
+import os
+
+from fastapi import FastAPI
+from fastapi.responses import RedirectResponse
+from fastapi.staticfiles import StaticFiles
+
+from vocero_api.api.router import router
+from vocero_api.core import config, diagnostics  # noqa: F401 - retain the startup banner
+
+app = FastAPI(title="s2s-demo")
+app.include_router(router)
+
+
+@app.get("/project", include_in_schema=False)
+@app.get("/project/", include_in_schema=False)
+@app.get("/project/index.html", include_in_schema=False)
+@app.get("/public/docs.html", include_in_schema=False)
+async def project_documentation() -> RedirectResponse:
+    return RedirectResponse("/docs/proposals/vocero-architecture.html", status_code=307)
+
+
+# The existing FastAPI /docs page remains registered ahead of this mount.
+app.mount("/docs", StaticFiles(directory=os.path.join(config.ROOT_DIR, "docs"), html=True), name="documentation")