This could help beginners to get autocompletion, catch mistakes earlier,
and allow them to skip the docs for simple configs.
This is not perfect because a lot of the plugins type all of their keys
as required, even though they have defaults, but this is good enough.
* Replace vim.opt with vim.o
Because it offers a nicer interface and info on hover.
For now leave vim.opt when using the table interface (until vim.o
with tables is implemented)
* Add type hint for vim.opt.rtp
* Add a comment about using vim.opt instead of vim.o
