fix(wezterm): tmux escape sequences

[javierportillo]

This fixes two problems with the previous implementation, first: use the -w0 argument to the base64 command to disable line wrapping so it doesn't output a new line character.

second: NeoVim seems to clear escape sequences before sending it into stdout, the only workaround I cound find was to use the call command to the chansend function.

Relevant links: https://github.com/neovim/neovim/issues/1496 https://github.com/neovim/neovim/issues/2765

https://github.com/user-attachments/assets/a66a7d06-20dc-4c37-abbe-0d0e5330fedc

*Video illustrates the toggling of ZenMode with the fix applied and NeoVim being able to change WezTerms font size.

[github-actions[bot]]

This PR is stale because it has been open 30 days with no activity.