fix(git): split long path args to avoid Windows CreateProcess limit

Git operations that stage or restore many files could exceed the Windows
command line length limit, causing os error 206 failures. This change
splits file paths into size-bounded chunks and concatenates the output
from multiple git invocations to keep commands within safe limits.

- Chunk file path arguments for Windows compatibility
- Add a local dev command to list pkg-config packages

.claude/settings.local.json

@@ -78,7 +78,8 @@
       "Bash(rustfmt --edition 2024 --check src/badge.rs src/main.rs)",
       "Bash(rustfmt --edition 2024 --check src/git.rs)",
       "Bash(rustfmt --edition 2024 --check src/badge.rs)",
-      "Bash(rustfmt --edition 2024 --check src/git.rs src/main.rs)"
+      "Bash(rustfmt --edition 2024 --check src/git.rs src/main.rs)",
+      "Bash(pkg-config --list-all)"
     ]
   }
 }