Create StylesPath prior to vale sync

[cotti]

This pull request ensures the .vale-styles directory exists before running vale sync, addressing a requirement introduced in Vale 3.14.2+.

More info: vale-cli/vale#1096

[theletterf]

Follow-up: this change broke downstream Vale CI because mkdir -p .vale-styles was added inside the heredoc that writes .vale.ini.temp. Vale then parsed it as config and failed during vale sync with:

key-value delimiter not found: mkdir -p .vale-styles

Fixed on main by moving the .vale-styles directory creation before the heredoc so it runs as shell instead of being written into the Vale config.

Fix commit: 241c453