feat(web): add extensible command palette (#1103)

Co-authored-by: Hugo Blom <6117705+huxcrux@users.noreply.github.com>
Co-authored-by: eggfriedrice <eggfriedricew.g.o@gmail.com>
Co-authored-by: Jono Kemball <jono-kemball@idexx.com>
Co-authored-by: Julius Marminge <julius0216@outlook.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>