docs: explain chproxy arguments #5500

Job	Run time
Test Agent Local / test_agent_local	39m 55s
Test API / API Test Local	8m 19s
Build / Build	9m 27s
Test Packages / Test ./internal/billing	4m 48s
Test Packages / Test ./internal/encryption	2m 1s
Test Packages / Test ./internal/hash	2m 18s
Test Packages / Test ./internal/id	2m 0s
Test Packages / Test ./internal/keys	3m 3s
Test Packages / Test ./internal/resend	1m 57s
Test Packages / Test ./internal/clickhouse	6m 22s
Test Packages / Test ./packages/api	2m 9s
Test Packages / Test ./packages/cache	2m 2s
Test Packages / Test ./packages/hono	2m 4s
Test Packages / Test ./packages/nextjs	2m 3s
Test Packages / Test ./packages/rbac	2m 5s
	1h 30m 33s

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