Inspired by a bit of fediverse discussion today that mentioned the
preview pane.

After redesigning the interface to that one a bit.

fd is actually pretty nice, btw.

...after writing this comment describing things:

https://lobste.rs/s/nsfdaw/improving_shell_workflows_with_fzf#c_b1puho

This has more features than parse_git_branch, though it could use a way
to display the _number_ of untracked / modified files (I'll have to see
if that's available).

I'm not including a copy of git-prompt.sh in the repo.  If it's not
available in the user's home directory, I mock up a function that uses
the old parse_git_branch instead.

nvim is totally horked on this system at present.

- tweak F7 binding for $MYVIMRC weirdness
  - re-add variants of ,td and ,tD bindings because they're easy to use
    for grabbing dates in logging stuff
  - conditionalized clipboard config for neovim
  - p1k3 now lives at ~/workspace/p1k3 by default
  - back to iceberg for color scheme again I guess?  I'm dissatisfied
    about colorschemes.
  - add rust.vim
  - turn gitgutter back on

(Which now means exa, if it's available.)

- Adds a P1K3_ROOT environment variable, and a default of
    ~/workspace/p1k3 (this is new)
  - allows exa for ls aliases
  - Tweaks h() history length a bit

`b foo` puts path to foo in ~/.directory_bookmarks.  `b` by itself opens
an fzf for selecting a bookmark to jump to.  intended as a companion to
h().

The `--no-sort` option to fzf effectively gives more recent matches first,
which turns out to be what I want in almost every case.

You can now do `h foo` and foo will be populated as the query, which feels
a bit more natural at times.

firefox-wrapper: start firefox (a workaround for some $PATH nonsense).

edit-clipboard: open current contents of clipboard in $EDITOR, write them
back to clipboard.  relies on xclip.

mcd(): a function to make a path and cd into it.

For use with the new mark(1) I've been sketching out lately.

...in the process of decluttering my homedir.

...looks like Debian has obsoleted this.

...seems like a more lightweight way of providing various settings to
Gtk apps (and maybe other stuff? I'm not sure).

Various other font tweaks and such in this commit.

Seems to involve less flailing, at least for this use case.