Add repo-level json schema docs config #256

Job	Run time
R Package Checks / revdeps-check	0s
R Package Checks / docs-check / docs-check	1m 2s
R Package Checks / codecov / test-coverage (ubuntu-latest)	2m 19s
R Package Checks / deps-main-check / deps-main	1m 22s
R Package Checks / check-R-updates / updated-files	5s
R Package Checks / codecov / test-coverage (windows-latest)	2m 3s
R Package Checks / codecov / test-coverage (macOS-latest)	1m 31s
R Package Checks / lintr / lint	1m 15s
R Package Checks / r-cmd-check / macOS-latest (release)	1m 9s
R Package Checks / r-cmd-check / windows-latest (release)	2m 17s
R Package Checks / r-cmd-check / windows-latest (4.1)	4m 40s
R Package Checks / r-cmd-check / ubuntu-latest (release)	1m 26s
R Package Checks / r-cmd-check / ubuntu-latest (devel)	1m 24s
R Package Checks / r-cmd-check / ubuntu-latest (oldrel-1)	1m 35s
R Package Checks / r-cmd-check / ubuntu-latest (oldrel-2)	1m 39s
R Package Checks / r-cmd-check / ubuntu-latest (oldrel-3)	1m 37s
R Package Checks / r-cmd-check / ubuntu-latest (oldrel-4)	1m 55s
R Package Checks / version-check / version-check	54s
	28m 13s

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