[FIX] apply instant compat flags during API load

[HappySean2845]

Summary

• add an operation-command hook so generated API commands can be patched whenever cli.Load runs
• apply hidden instant compatibility flags to runtime-loaded API commands
• keep list-instant-operations/help output free of hidden compatibility aliases

Verification

• go test ./cli -run TestLoadAppliesOperationCommandHooks -count=1
• go test ./cmd/surf -run 'TestHiddenCompatRootFlags|TestSearchWebQueryCompatAlias|TestJSONFlagAlias|TestListInstantOperations|TestFilterInstantOperations|TestShouldInjectAPIName|TestNeedsCachedAPI' -count=1
• local binary: surf search-web --query bitcoin --json

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