Filetype-dependent settings need re-examined

[benknoble]

This is a lengthy one.

It comes down to about 3 things:

1. Tab settings are handled ok-ish by the default plugins. Remove 'global' settings. I'd really like to use expandtab, obviously. Consider shiftround as well. And don't forget shiftwidth (tabstop=8 always)
2. Filetype autocommands can actually be moved to /.vim/ftplugin/<type>.vim to set local options and use <localleader> for mappings.
3. Once 'global' settings are removed, keep an eye out for changes that need to be made and add them.

Plugin files are used for defining file-dependent settings.

Basically, what I want to do is eschew settings that are too global for different filetypes, move my personal prefs into filetype plugins, and then rely on the defaults until I decide I need to change something.

⚠️ 💥 This will likely require a :retab of all files! ❗️❗️

[benknoble]

Turns out, setting e.g. shiftwidth or softtabstop does get overridden by ftplugin entries