feat: Add ExecuteCommand action in component template

[deepanchal]

Description

Adds Action::ExecuteCommand in component template to demonstrate spawning child processes from tui. This PR is related to this thread ratatui/ratatui-website#651 (comment)

The goal is to add this functionality directly to component template so that we can demonstrate

pausing the key event handler before spawning vim and restarting the key event handler after resuming from vim exiting
and link to this feature from ratatui docs on How to spawn vim (ratatui/ratatui-website#651)

I am not sure if this is out of scope for the component template. Any feedback is appreciated!! Thanks!

[kdheepak]

It feels a little misplaced in a template but I'm also not sure how to better convey that this is how this feature should be implemented.

I'm open to being overruled though.

[joshka]

It feels a little misplaced in a template but I'm also not sure how to better convey that this is how this feature should be implemented.

I'm open to being overruled though.

I agree - I wanted to let you weigh in on it first before I said something though as I'm just 70/30 against.

[deepanchal]

I think that adding vim spawning logic in component template is a bit too specific. I think we need a little more generic example in template. Also, we have some open PRs like this one (ratatui/ratatui#1180) which might make big changes in the template repo, so I was also thinking about long term maintenance of the template. Although vim is a good example since it needs control over input/outputs, I think we need to spawn some other command which does a better job at demonstrating pausing tui, spawn child process, and resume tui. We may not need this at all. Just a thought

[kdheepak]

Maybe linking to this PR might be good stopgap solution for now?