[Feature] Get the current mode from the terminal

[pit-ray]

Discussed in https://github.com/pit-ray/win-vind/discussions/97

^{Originally posted by tesses June 13, 2022} I want to make editor's key-bindings when a specific mode is active.

A command in the shell like that probably it can solve this problem: path/to/exe/win-vind.exe --status Response: {"mode": "en", "version": "4.3"}

Implementation of --version, --status, and --command.