feat(home): add pi coding agent configuration

- Add pi module for terminal configuration
- Include pi-coding-agent package in home.packages
- Configure pi with llama-swap provider via models.json
- Enable pi for mac-va-mbp-work profile

modules/home/programs/terminal/pi/default.nix

@@ -0,0 +1,46 @@
+{ lib
+, pkgs
+, config
+, namespace
+, ...
+}:
+let
+  inherit (lib) mkIf;
+
+  helpers = import ./lib.nix { inherit lib; };
+  llamaSwapConfig = import ./../../../../nixos/services/llama-swap/config.nix { inherit pkgs; };
+
+  cfg = config.${namespace}.programs.terminal.pi;
+in
+{
+  options.${namespace}.programs.terminal.pi = {
+    enable = lib.mkEnableOption "enable pi";
+  };
+
+  config = mkIf cfg.enable {
+    # Add Pi Coding Agent to Home Packages
+    home.packages = with pkgs; [
+      reichard.pi-coding-agent
+    ];
+
+    # Define Pi Configuration
+    sops = {
+      secrets.context7_apikey = {
+        sopsFile = lib.snowfall.fs.get-file "secrets/common/evanreichard.yaml";
+      };
+      templates."pi.json" = {
+        path = "${config.home.homeDirectory}/.pi/agent/models.json";
+        content = builtins.toJSON {
+          providers = {
+            "llama-swap" = {
+              baseUrl = "https://llm-api.va.reichard.io/v1";
+              api = "openai-completions";
+              apiKey = "none";
+              models = helpers.toPiModels llamaSwapConfig;
+            };
+          };
+        };
+      };
+    };
+  };
+}