deck file openapi2mcp shows an invalid mode in the flags

[harshadixit12]

When running deck file openapi2mcp --help it lists invalid values for the mode:
-m, --mode string ai-mcp-proxy mode: 'conversion' (client mode) or 'conversion-listener' (server mode). (default "conversion-listener")

The modes supported by MCP are:
passthrough-listener
conversion-listener
conversion-only
listener

'conversion' which is mentioned in the help page is not a valid mode and should be removed. The help page should also mention 'conversion-only', 'listener' and 'passthrough-listener' as valid modes.