[FEATURE REQUEST] Disable unecessary nvim builtin plugins to boost startup time.

[connorgmeehan]

What is the feature, what would you like to be able to do?

Currently there are unecessary nvim builtin plugins enabled, disabling them would increase doom-nvim startup time.

Possible Implementation (if applicable)

This should be added at the top of lua/doom/core/init.lua or in lua/doom/core/disable_builtins.lua if it's too long

Additional context

[edwintorok]

https://github.com/edwintorok/doom-nvim/commit/917bb2a21c244a1d121ce0a29607c7b1c1f6ffa0 and https://github.com/edwintorok/doom-nvim/commit/eb8fe3e263e0b69f15a2c17eaa7b8df385892d55 would partially address this. I'll have to repeat the startup time measurements for the 4.x version (the one in the commit message is from 3.x). Do you want a PR?