chore: gitignore .playwright-mcp/ runtime cache

Playwright MCP writes per-session console logs and page snapshots into
.playwright-mcp/ when used for testing. Local debug artefacts only —
no source value, shouldn't appear as untracked noise after running the
dashboard mollifier challenge scripts.

Author: d-cs

.gitignore

@@ -72,4 +72,5 @@ apps/**/public/build
 .mcp.log
 .mcp.json
 .cursor/debug.log
-ailogger-output.log
+ailogger-output.log
+.playwright-mcp/