Install RTK rules in .windsurfrules (project-scoped) so Cascade
prefixes shell commands with rtk for token savings.
Windsurf hooks don't support command rewriting (only blocking),
so RTK uses the rules-based approach (like Codex with AGENTS.md).
Tested: Windsurf Cascade correctly uses rtk git status after install.
Signed-off-by: Patrick szymkowiak <patrick.szymkowiak@innovtech.eu>
patrick szymkowiak