Add Cloudflare Pages docs preview with /preview-docs slash command (#… #3243

Job	Run time
checks / pre-commit	53s
checks / docs	40s
checks / readme-snippets	16s
checks / test (3.10, lowest-direct, windows-latest)	1m 55s
checks / test (3.13, lowest-direct, windows-latest)	2m 23s
checks / test (3.11, locked, windows-latest)	3m 0s
checks / test (3.11, lowest-direct, windows-latest)	2m 0s
checks / test (3.13, locked, windows-latest)	1m 45s
checks / test (3.12, locked, windows-latest)	1m 58s
checks / test (3.10, locked, windows-latest)	1m 47s
checks / test (3.14, locked, windows-latest)	2m 26s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 26s
checks / test (3.14, lowest-direct, windows-latest)	1m 49s
checks / test (3.11, locked, ubuntu-latest)	1m 14s
checks / test (3.12, lowest-direct, windows-latest)	1m 52s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 13s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 7s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 16s
checks / test (3.10, locked, ubuntu-latest)	1m 24s
checks / test (3.14, locked, ubuntu-latest)	2m 14s
checks / test (3.12, locked, ubuntu-latest)	1m 33s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 24s
checks / test (3.13, locked, ubuntu-latest)	1m 15s
all-green	3s
	36m 53s

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