fix(pre-commit): remove md from biome check file pattern

Biome 2.x does not support Markdown checking, causing errors on
CLAUDE.md. Remove md from the hook's file filter. Also includes
minor autofix changes from biome (trailing newlines).

.pre-commit-config.yaml

@@ -27,7 +27,7 @@ repos:
         name: Biome Check
         entry: yarn biome check --write --files-ignore-unknown=true --no-errors-on-unmatched
         language: system
-        files: \.(js|ts|jsx|tsx|json|md)$
+        files: \.(js|ts|jsx|tsx|json)$
       - id: markdown-table-formatter
         name: Markdown Table Formatter
         entry: yarn markdown-table-formatter