update copyright year

I've only had this copyright date since 2019? I've had this under hg
control since 2010.

flycheck-mode: unbind list-errors

I don't remember what this was interfering with, but I guess I don't
want this keybinding.

whitespace cleanup

visual-line-mode: show indicators in the fringe

Oh god why isn't this default

js2-mode: make it less complainy

I don't always use semicolons or care about trailing commas in js.

never show dialogue boxes

I don't know what happened but something opened a new X window and
that just should never happen.

rustic: use lsp-mode

I like it better than eglot for now, may go back some day.

annotate: make hg annotation less verbose

I really just care about the user

typescript: indent with two spaces

markdown-mode: enable gfm

Github-flavoured markdown is pretty much the only one I use, sorry
CommonMark.

lsp-mode: only show doc with mouse

It gets a little annoying to get docs all the time when using the
keyboard.

add new flycheck checkers

So much flychecking now, we really are living in the future

show wide line numbers when narrowed

New feature of narrowing, now we can see pre-narrowed line numbers!

use lsp-mode for typescript

Hell yeah, love me some lsp-mode now

remove stray comment

I forget what this was about. `hg grep --diff` could find it if I
really cared.

disable elpy

I no longer use this, lsp-mode has me covered now

rustic-mode: enable company mode, disable eglot hints

packages: remove unused path

install new packages

namely: olivetti ca65-mode dap-mode typescript-mode go-mode
        graphql-mode nov flycheck-eglot

org2blog: remove more residual config