feat: add psagentai agent with deployment and configuration

Initial project setup including the main agent script, configuration
files, profile JSON state, systemd service unit, startup script,
deployment documentation, and Python dependencies.

Includes .env, venv/, and __pycache__/ which should likely be
excluded via .gitignore to avoid committing secrets and artifacts.

venv/lib/python3.11/site-packages/httpx/_transports/mock.py

@@ -0,0 +1,38 @@
+import typing
+
+from .._models import Request, Response
+from .base import AsyncBaseTransport, BaseTransport
+
+SyncHandler = typing.Callable[[Request], Response]
+AsyncHandler = typing.Callable[[Request], typing.Coroutine[None, None, Response]]
+
+
+class MockTransport(AsyncBaseTransport, BaseTransport):
+    def __init__(self, handler: typing.Union[SyncHandler, AsyncHandler]) -> None:
+        self.handler = handler
+
+    def handle_request(
+        self,
+        request: Request,
+    ) -> Response:
+        request.read()
+        response = self.handler(request)
+        if not isinstance(response, Response):  # pragma: no cover
+            raise TypeError("Cannot use an async handler in a sync Client")
+        return response
+
+    async def handle_async_request(
+        self,
+        request: Request,
+    ) -> Response:
+        await request.aread()
+        response = self.handler(request)
+
+        # Allow handler to *optionally* be an `async` function.
+        # If it is, then the `response` variable need to be awaited to actually
+        # return the result.
+
+        if not isinstance(response, Response):
+            response = await response
+
+        return response