Add support for configuration override on the CLI

[jhelison]

Is your feature request related to a problem? Please describe.
All the configurations are load statically from the configuration file. The same attributes could be loaded from the CLI commands as extra parameters.

Describe the solution you'd like
Accept flags like --server.listen_addr to override specific addr at runtime.

Describe alternatives you've considered
Changing the config.toml values manually each deploy.

Additional context
Useful for custom configuration and quick fixes.

[getcakedieyoungx]

Hi @jhelison! I'd like to work on this issue.

My plan is to add support for overriding configuration values via CLI flags, such as --server.listen_addr, so that users can specify these at runtime without editing the config file.

I'll start by adding flag parsing to the CLI and ensuring that CLI-provided values take precedence over the config file. Could you please assign this issue to me?