feature: Set filetype to lua for plugin inspect window

[pedropombeiro]

Did you check the docs?

• I have read all the lazy.nvim docs

Is your feature request related to a problem? Please describe.

When I use <localleader>i to inspect a plugin configuration, the lua code is not very readable.

Describe the solution you'd like

I'd like the popup window to default to the lua filetype.

Describe alternatives you've considered

I've explicitly called :setfiletype lua, but this is tedious.

Additional context

No response