Build

[Docs] Document `dstack offer` #4418

Job	Run time
python-lint	15s
docs-build	1m 16s
gateway-build	11s
frontend-build	9s
runner-test	48s
python-test (macos-latest, 3.9)	1m 2s
python-test (macos-latest, 3.10)	1m 2s
python-test (macos-latest, 3.11)	1m 3s
python-test (macos-latest, 3.12)	1m 11s
python-test (macos-latest, 3.13)	1m 3s
python-test (ubuntu-latest, 3.9)	2m 54s
python-test (ubuntu-latest, 3.10)	3m 7s
python-test (ubuntu-latest, 3.11)	2m 48s
python-test (ubuntu-latest, 3.12)	2m 54s
python-test (ubuntu-latest, 3.13)	2m 48s
python-test (windows-latest, 3.9)	1m 1s
python-test (windows-latest, 3.10)	1m 17s
python-test (windows-latest, 3.11)	1m 10s
python-test (windows-latest, 3.12)	1m 18s
python-test (windows-latest, 3.13)	1m 10s
runner-compile (linux, amd64, ubuntu-latest)	26s
runner-upload	15s
generate-json-schema	19s
update-get-dstack	8s
	29m 35s

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