docs: move docs from juju.is #1319

Job	Run time
Validate (3.10)	21s
Build test (3.10)	17s
Unit tests (3.8)	28s
Unit tests (3.9)	25s
Unit tests (3.10)	31s
Unit tests (3.11)	23s
Unit tests (3.12)	23s
Unit tests (3.13)	28s
Quarantined Integration Tests (3.10, 3.1/stable)	2m 34s
Integration (3.10, 3.1/stable)	2m 35s
Quarantined Integration Tests (3.10, 3.3/stable)	2m 35s
Integration (3.10, 3.3/stable)	2m 35s
Quarantined Integration Tests (3.10, 3.4/stable)	2m 35s
Integration (3.10, 3.4/stable)	2m 35s
Integration (3.10, 3.5/stable)	2m 34s
Quarantined Integration Tests (3.10, 3.5/stable)	2m 35s
Integration (3.10, 3.6/stable)	2m 35s
Quarantined Integration Tests (3.10, 3.6/stable)	2m 35s
	29m 4s

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