feat: initial project setup with psagentia agent implementation

Add core Python agent with configuration management, environment setup,
and deployment documentation. Includes user/agent profiles, startup
scripts, and dependency management for the psagentia system.

venv/lib/python3.11/site-packages/pip/_internal/resolution/base.py

@@ -0,0 +1,20 @@
+from collections.abc import Callable
+
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.req.req_set import RequirementSet
+
+InstallRequirementProvider = Callable[
+    [str, InstallRequirement | None], InstallRequirement
+]
+
+
+class BaseResolver:
+    def resolve(
+        self, root_reqs: list[InstallRequirement], check_supported_wheels: bool
+    ) -> RequirementSet:
+        raise NotImplementedError()
+
+    def get_installation_order(
+        self, req_set: RequirementSet
+    ) -> list[InstallRequirement]:
+        raise NotImplementedError()