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>

.gitignore

@@ -1,8 +1,8 @@
 node_modules/
 dist/
 
-# Pi persistent config — never commit
-.pi/
+# SproutClaw persistent config — never commit
+.sproutclaw/
 *.log
 .DS_Store
 *.tsbuildinfo
@@ -28,7 +28,7 @@ packages/*/dist-firefox/
 .npm/
 coverage/
 .nyc_output/
-.pi_config/
+.sproutclaw_config/
 tui-debug.log
 compaction-results/
 .opencode/
@@ -39,34 +39,34 @@ out.html
 packages/coding-agent/binaries/
 todo.md
 plans/
-.pi/hf-sessions/
-.pi/hf-sessions-backup/
-.pi/sessions/
-.pi/extensions/webui/.webui.pid
-.pi/extensions/webui/.webui.log
+.sproutclaw/hf-sessions/
+.sproutclaw/hf-sessions-backup/
+.sproutclaw/sessions/
+.sproutclaw/extensions/webui/.webui.pid
+.sproutclaw/extensions/webui/.webui.log
 # Local runtime / secrets (do not commit)
 .local/
 progress.md
 
-# Pi agent: track extensions, ignore local runtime secrets and sessions
-.pi/agent/sessions/
-.pi/agent/git/
-.pi/agent/npm/
-.pi/agent/bin/
-.pi/agent/data/
-.pi/agent/auth.json
-.pi/agent/models.json
-.pi/agent/settings.json
-.pi/agent/mcp.json
-.pi/agent/mcp-cache.json
-.pi/agent/mcp-npx-cache.json
-.pi/agent/run-history.jsonl
-.pi/agent/taskplane/
-.pi/agent/skills/
-.pi/agent/skills-disabled/
-.pi/agent/extensions/webui/frontend/node_modules/
-.pi/agent/extensions/webui/.webui.pid
-.pi/agent/extensions/webui/data/
+# SproutClaw agent: track extensions, ignore local runtime secrets and sessions
+.sproutclaw/agent/sessions/
+.sproutclaw/agent/git/
+.sproutclaw/agent/npm/
+.sproutclaw/agent/bin/
+.sproutclaw/agent/data/
+.sproutclaw/agent/auth.json
+.sproutclaw/agent/models.json
+.sproutclaw/agent/settings.json
+.sproutclaw/agent/mcp.json
+.sproutclaw/agent/mcp-cache.json
+.sproutclaw/agent/mcp-npx-cache.json
+.sproutclaw/agent/run-history.jsonl
+.sproutclaw/agent/taskplane/
+.sproutclaw/agent/skills/
+.sproutclaw/agent/skills-disabled/
+.sproutclaw/agent/extensions/webui/frontend/node_modules/
+.sproutclaw/agent/extensions/webui/.webui.pid
+.sproutclaw/agent/extensions/webui/data/
 tmp/
 bun.lock
 collect.sh