docs: move docs from juju.is #1325

Job	Run time
Validate (3.10)	24s
Build test (3.10)	21s
Unit tests (3.8)	25s
Unit tests (3.9)	23s
Unit tests (3.10)	26s
Unit tests (3.11)	24s
Unit tests (3.12)	26s
Unit tests (3.13)	32s
Integration (3.10, 3.1/stable)	32m 45s
Quarantined Integration Tests (3.10, 3.1/stable)	39m 5s
Integration (3.10, 3.3/stable)	35m 46s
Quarantined Integration Tests (3.10, 3.3/stable)	38m 32s
Integration (3.10, 3.4/stable)	33m 15s
Quarantined Integration Tests (3.10, 3.4/stable)	42m 30s
Integration (3.10, 3.5/stable)	33m 22s
Quarantined Integration Tests (3.10, 3.5/stable)	41m 31s
Integration (3.10, 3.6/stable)	35m 38s
Quarantined Integration Tests (3.10, 3.6/stable)	42m 2s
	6h 17m 47s

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