.config/nvim/init.vim: Add indentation rules for Python
.config/nvim/init.vim: Indent html and css with spaces
.config/nvim/init.vim: Remove newline

This makes clearer the relation between these two sections of code.
.config/nvim/init.vim: Remove old commented-out code
Remove rarely-used firefox alias
.config/bash/aliases: Remove legacy smlss aliases
.config/bash/aliases: Replace grep with '-d 1' option
.bashrc: Remove unwanted files by force
Revert "bash/aliases: Add --show-signature to gsh"

This reverts commit 3506916b3a5ff4932fc0ff3e1d1002a69a577ce0.
.config/nvim/init.vim: Remove `set softtabstop=8`

    This created annoyances where pressing backspace would delete more than
    one whitespace character, even in strings, when I only wanted to delete

    Over the coming days and weeks, I may be going over a lot of what is in
    this file, as a lot if it is copy-pasted from various sources, and
    hasn't really been looked at that much. I will see if things are still
    necessary, or if I may prefer them a different way now that I've learned
    more about the way I like my system since when lots of this file was
    first written.
.config/nvim/init.vim: Center window when viewing search results
.config/bash/env_vars: Add Ruby programs to $PATH
Add my git config
.config/bash/aliases: Add 'gra' alias
.xinitrc: Don't print ProtonVPN status information if Wi-Fi is disabled
.xinitrc: Set pvpn_status to nothing, not ''
.xinitrc: Disable my finger
.xinitrc: Keep comments less than 80 chars
.xinitrc: Use an if statement instead of && and ||