feat: add project-review workflow (whole-project / single-feature review)

Adds the project-review workflow for code review independent of the git
diff. The scope is parsed from the user instruction: 全面/整个项目 ->
whole-project (score every source file), otherwise feature + target
keyword (locate the code with semantic search + graph queries).

- scoring_tools.py: score_review_func gains all_files=True to score every
  source file in the graph via store.get_all_files()
- main.py: score_review_tool gains all_files param; registers the
  project_review MCP prompt (prompts 6->7)
- prompts.py: project_review_prompt(scope, target) with whole-project and
  feature branches (fixed a precedence bug that truncated the feature text)
- skills.py + skills/project-review/: new read-only project-review skill
  with shared checklists
- .opencode/command/code-review-graph-project-review.md: slash command
- tests: test_project_review.py (prompt rendering), TestProjectReviewPrompt,
  skill count assertions 5->6, all_files wiring checks
- docs: prompts (6->7) + project-review entries across COMMANDS, CLAUDE,
  README (+localized), INDEX, architecture, LLM-OPTIMIZED-REFERENCE,
  CHANGELOG

tests/test_skills.py

@@ -118,12 +118,13 @@ class TestGenerateSkills:
         assert result.is_dir()
         assert result == tmp_path / ".claude" / "skills"
 
-    def test_creates_five_skill_subdirs(self, tmp_path):
+    def test_creates_six_skill_subdirs(self, tmp_path):
         skills_dir = generate_skills(tmp_path)
         subdirs = sorted(f.name for f in skills_dir.iterdir() if f.is_dir())
         assert subdirs == [
             "debug-issue",
             "explore-codebase",
+            "project-review",
             "refactor-safely",
             "review-changes",
             "unified-review",
@@ -153,6 +154,7 @@ class TestGenerateSkills:
         for skill_name in (
             "debug-issue",
             "explore-codebase",
+            "project-review",
             "refactor-safely",
             "review-changes",
             "unified-review",
@@ -169,7 +171,7 @@ class TestGenerateSkills:
         result = generate_skills(tmp_path, skills_dir=custom)
         assert result == custom
         assert result.is_dir()
-        assert len(list(result.iterdir())) == 5
+        assert len(list(result.iterdir())) == 6
 
     def test_skill_content_includes_get_minimal_context(self, tmp_path):
         """Every skill template must reference get_minimal_context."""
@@ -194,7 +196,7 @@ class TestGenerateSkills:
         generate_skills(tmp_path)
         generate_skills(tmp_path)
         skills_dir = tmp_path / ".claude" / "skills"
-        assert len(list(skills_dir.iterdir())) == 5
+        assert len(list(skills_dir.iterdir())) == 6
 
 
 class TestGenerateHooksConfig:
@@ -859,8 +861,10 @@ class TestCodeBuddyPlatform:
         assert {path.name for path in skills_root.iterdir()} == {
             "debug-issue",
             "explore-codebase",
+            "project-review",
             "refactor-safely",
             "review-changes",
+            "unified-review",
         }
         for skill_dir in skills_root.iterdir():
             content = (skill_dir / "SKILL.md").read_text(encoding="utf-8")