format: apply repo prettier (3.8.1) to the folded skills tree

963 markdown files reformatted with the repository's pinned prettier so
pnpm format:check covers the folded tree like every other repo file.

The formatter's embedded-language pass also normalized code fences
(TS semicolons, closed HTML tags in examples, lowercased CSS hex colors,
one renumbered list that skipped an index). Alphanumeric token deltas vs
the fold commit were audited file-by-file; all are formatter-equivalent
markup normalizations plus the four sanitized skills.

packages/mosaic/framework/skills/code-review-excellence/reference/c.md

@@ -264,22 +264,26 @@ clang-format -i src/*.c include/*.h
 ## Review Checklist
 
 ### Memory and UB
+
 - [ ] All buffers have explicit size parameters
 - [ ] No out-of-bounds access or pointer arithmetic past objects
 - [ ] No use after free or uninitialized reads
 - [ ] Signed overflow and shift rules are respected
 
 ### API and Design
+
 - [ ] Ownership rules are documented and consistent
 - [ ] const-correctness is applied for inputs
 - [ ] Error contracts are clear and consistent
 
 ### Concurrency
+
 - [ ] No data races on shared state
 - [ ] volatile is not used for synchronization
 - [ ] Locks are held for minimal time
 
 ### Tooling and Tests
+
 - [ ] Builds clean with warnings enabled
 - [ ] Sanitizers run on critical code paths
 - [ ] Static analysis results are addressed