docs: document go packages and minor stuff #6461

# to view logs

Job	Run time
Test Agent Local / test_agent_local	39m 25s
Build / Build	10m 17s
Test API / API Test Local	10m 45s
Test Go API Local / test_agent_local	5m 59s
Test Packages / Test ./internal/billing	1m 31s
Test Packages / Test ./internal/encryption	3m 25s
Test Packages / Test ./internal/hash	2m 23s
Test Packages / Test ./internal/id	3m 25s
Test Packages / Test ./internal/keys	2m 36s
Test Packages / Test ./internal/resend	2m 28s
Test Packages / Test ./internal/clickhouse	4m 34s
Test Packages / Test ./packages/api	2m 33s
Test Packages / Test ./packages/cache	2m 41s
Test Packages / Test ./packages/hono	2m 57s
Test Packages / Test ./packages/nextjs	1m 40s
Test Packages / Test ./packages/rbac	2m 26s
	1h 39m 5s

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