doc: add grip-theme #68

Job	Run time
build (ubuntu-latest, 25.3, false)	35s
build (ubuntu-latest, 26.3, false)	38s
build (ubuntu-latest, 27.2, false)	40s
build (ubuntu-latest, 28.2, false)	44s
build (ubuntu-latest, 29.4, false)	58s
build (macos-latest, 25.3, false)	37s
build (macos-latest, 26.3, false)	35s
build (macos-latest, 27.2, false)	39s
build (macos-latest, 28.2, false)	40s
build (macos-latest, 29.4, false)	57s
build (windows-latest, 25.3, false)	34s
build (windows-latest, 26.3, false)	34s
build (windows-latest, 27.2, false)	41s
build (windows-latest, 28.2, false)	39s
build (windows-latest, 29.4, false)	54s
build (ubuntu-latest, snapshot, true)	34s
build (macos-latest, snapshot, true)	36s
build (windows-latest, snapshot, true)	34s
	12m 9s

Provide feedback