feat(core): calendar legend #6886

Job	Run time
Run affected Build, Lint and test commands	10m 55s
Run affected e2e commands	40m 30s
Nx Cloud Agent 1	12m 6s
Nx Cloud Agent 2	12m 6s
Nx Cloud Agent 3	12m 5s
Nx Cloud Agent 4	12m 5s
Nx Cloud Agent 5	12m 5s
Nx Cloud Agent 6	12m 6s
Nx Cloud Agent 7	12m 4s
Nx Cloud Agent 8	12m 4s
Nx Cloud - Stop Agents	1m 45s
	2h 29m 51s

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