Move the four keymap-harness files (test-keymaps.sh/.lua and the Vim
counterparts) into a development/tests/ subfolder so they sit apart from
the interactive dev launchers. REPO_ROOT now climbs two levels, and the
internal source paths, CI invocations, and ONBOARDING tree are updated.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
