Health check: checkhealth telescope-live-grep-args / checkhealth telescope

[DominikOcsofszki]

The nvim-live-grep-args extension currently has no health check feature.

Describe the solution you’d like:
A health check function should be added to the nvim-live-grep-args extension. This function would verify:

• That the required dependencies (ripgrep, ...(?)) are installed and accessible.
• That the live_grep_args extension is properly loaded into telescope.nvim.

Describe alternatives you’ve considered:
A better solution would be to integrate the health check directly into the core telescope.nvim health check system, so that it runs as part of :checkhealth telescope for all extensions. This can be done in 'telescope.register_extension({})'

Additional context:
Connected to Issue #83 (?)

Additional questions (FrOSCon):

• Add check for deprecated features, like WARNING vim.tbl_flatten is deprecated -> upgrade plugin?

Since this is my first Contribution, please let me know how to improve!
I would like to help implement this.

[DominikOcsofszki]

Should more options be checked?