* chore: remove outdated pr-review skill
The .qwen/skills/pr-review skill is outdated and no longer needed.
Also removes the dangling reference from terminal-capture skill.
* chore: add token-stats script to e2e-testing skill
* fix(test): remove flaky AskUserQuestionDialog Submit tab test
The "shows Submit tab for multiple questions" test fails on macOS CI
due to terminal width truncation causing "Submit answers" to render
as just "Submit".
