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/pip/_internal/utils/datetime.py

@@ -0,0 +1,28 @@
+"""For when pip wants to check the date or time."""
+
+import datetime
+import sys
+
+
+def today_is_later_than(year: int, month: int, day: int) -> bool:
+    today = datetime.date.today()
+    given = datetime.date(year, month, day)
+
+    return today > given
+
+
+def parse_iso_datetime(isodate: str) -> datetime.datetime:
+    """Convert an ISO format string to a datetime.
+
+    Handles the format 2020-01-22T14:24:01Z (trailing Z)
+    which is not supported by older versions of fromisoformat.
+    """
+    # Python 3.11+ supports Z suffix natively in fromisoformat
+    if sys.version_info >= (3, 11):
+        return datetime.datetime.fromisoformat(isodate)
+    else:
+        return datetime.datetime.fromisoformat(
+            isodate.replace("Z", "+00:00")
+            if isodate.endswith("Z") and ("T" in isodate or " " in isodate.strip())
+            else isodate
+        )