feat: make window name configurable

[cry999]

What

What does this pull request accomplish?

• make window name configurable

How

What code changes were made to accomplish it?

• Extracted '#I:#W' as a variable. And made it configurable, as below:

set -g @tmux2k-window-name-format "█ #{window_index} #{window_name}:#{b:pane_current_path}"

Why

• I want to use pane path as window name to make it easier to understand what I was doing in which window.

Screenshots (If applicable)

tmux.conf:

set -g @tmux2k-window-name-format "█ #{window_index} #{window_name}:#{b:pane_current_path}"

screenshots:

Notes

This is my first time submitting a pull request, so I'm sorry if there's anything weird.

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• New and existing unit tests pass locally with my changes

[2KAbhishek]

Thanks for the PR!