[ty] Rename the ty review skill (#29510)

Rename the ty review skill from `review-ty-pr` to `review-ty-changes` to
reflect its coverage of local changes. Update the skill's directory,
metadata name, and default prompt.

Stacked on #29509.

.agents/skills/review-ty-changes/SKILL.md

@@ -1,5 +1,5 @@
 ---
-name: review-ty-pr
+name: review-ty-changes
 description: Review ty changes in astral-sh/ruff, including pull requests and local changes just written by a user or an agent. Use when asked to review, re-review, audit, or inspect ty changes for correctness, regressions, architecture, maintainability, test coverage, unnecessary complexity, or meaningful style and consistency issues.
 ---
 

.agents/skills/review-ty-changes/agents/openai.yaml

@@ -1,4 +1,4 @@
 interface:
   display_name: "Review ty changes"
   short_description: "Nitpicky, evidence-backed reviews of ty changes"
-  default_prompt: "Use $review-ty-pr to perform a thorough, deliberately nitpicky review of these ty changes."
+  default_prompt: "Use $review-ty-changes to perform a thorough, deliberately nitpicky review of these ty changes."