docs: add sample image download and sv.plot_image() to detect_and_ann… #1148

Job	Run time
Build this Package / build	22s
Import Test and Pytest Run (ubuntu-latest, 3.12)	43s
Import Test and Pytest Run (macos-latest, 3.13)	50s
Import Test and Pytest Run (ubuntu-latest, 3.11)	37s
Import Test and Pytest Run (windows-latest, 3.12)	1m 41s
Import Test and Pytest Run (windows-latest, 3.9)	1m 32s
Import Test and Pytest Run (windows-latest, 3.10)	1m 19s
Import Test and Pytest Run (ubuntu-latest, 3.13)	36s
Import Test and Pytest Run (windows-latest, 3.11)	1m 11s
Import Test and Pytest Run (macos-latest, 3.9)	1m 25s
Import Test and Pytest Run (macos-latest, 3.12)	1m 12s
Import Test and Pytest Run (windows-latest, 3.13)	1m 13s
Import Test and Pytest Run (macos-latest, 3.10)	59s
Import Test and Pytest Run (ubuntu-latest, 3.10)	39s
Import Test and Pytest Run (macos-latest, 3.11)	1m 29s
Import Test and Pytest Run (ubuntu-latest, 3.9)	39s
testing-guardian	4s
	16m 31s

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