feature: show when plugin would be loaded in the 'Not Loaded' section of Lazy UI

[craigmac]

Did you check the docs?

• I have read all the lazy docs

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

No problem, just requires going to the specific plugin config and looking when it would load manually.

Describe the solution you'd like

I'd like to see e.g. "markdown" beside a plugin that loads on ft = 'markdown' in it's spec, just like the 'Loaded' section shows what caused the plugin to load.

Describe alternatives you've considered

Fuzzy find to the plugin not yet loaded and investigate manually.

Additional context

No response