docs: move docs from juju.is #1317

Job	Run time
Build test (3.10)	26s
Validate (3.10)	26s
Unit tests (3.8)	30s
Unit tests (3.9)	27s
Unit tests (3.10)	23s
Unit tests (3.11)	19s
Unit tests (3.12)	1m 1s
Unit tests (3.13)	31s
Quarantined Integration Tests (3.10, 3.1/stable)	37m 27s
Integration (3.10, 3.1/stable)	35m 12s
Quarantined Integration Tests (3.10, 3.3/stable)	37m 16s
Integration (3.10, 3.3/stable)	34m 29s
Quarantined Integration Tests (3.10, 3.4/stable)	41m 52s
Integration (3.10, 3.4/stable)	36m 32s
Quarantined Integration Tests (3.10, 3.5/stable)	41m 54s
Integration (3.10, 3.5/stable)	34m 21s
Quarantined Integration Tests (3.10, 3.6/stable)	42m 56s
Integration (3.10, 3.6/stable)	33m 58s
	6h 20m 0s

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