feat(coding-agent): isolate SproutClaw namespace from upstream pi

Use piConfig name sproutclaw and configDir .sproutclaw so commands, env vars,
and project config no longer collide with the stock pi install.

Co-authored-by: Cursor <cursoragent@cursor.com>

packages/coding-agent/package.json

@@ -4,7 +4,8 @@
 	"description": "Coding agent CLI with read, bash, edit, write tools and session management",
 	"type": "module",
 	"piConfig": {
-		"configDir": ".pi"
+		"name": "sproutclaw",
+		"configDir": ".sproutclaw"
 	},
 	"bin": {
 		"pi": "dist/cli.js"