Add `didVisitURL` delegate method #89

Job	Run time
Cxx interop / Construct Cxx interop matrix	3s
Unit tests / Construct unit test matrix	3s
Soundness / Documentation check	2m 58s
Soundness / API breakage check	4m 18s
Soundness / Broken symlinks check	2s
Soundness / Format check	38s
Soundness / License headers check	3s
Soundness / Shell check	31s
Soundness / Unacceptable language check	2s
Soundness / Python lint check	5s
Soundness / YAML lint check	4s
Cxx interop / Cxx interop / Linux (5.9)	2m 29s
Cxx interop / Cxx interop / Linux (5.10)	2m 16s
Cxx interop / Cxx interop / Linux (6.0)	2m 45s
Cxx interop / Cxx interop / Linux (nightly-6.1)	3m 14s
Cxx interop / Cxx interop / Linux (nightly-main)	3m 10s
Unit tests / Unit tests / Linux (5.9)	4m 32s
Unit tests / Unit tests / Linux (5.10)	4m 41s
Unit tests / Unit tests / Linux (6.0)	5m 1s
Unit tests / Unit tests / Linux (nightly-6.1)	5m 30s
Unit tests / Unit tests / Linux (nightly-main)	5m 33s
	47m 58s

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