Add a commit-msg hook lint and various other cleanups

Turns out that gitlint by default enforces the exact commit-msg format that I
like to use. I'm enabling this because even I write poor commit messages
sometimes, and looking back on my commits from even a few days ago is sometimes
not very helpful.

I also made some minor comment and nix changes that I noticed while reviewing my
work from the last few days.

1 files changed, 2 insertions, 0 deletions

diff --git a/Biz/Ide/hooks/commit-msg b/Biz/Ide/hooks/commit-msg
new file mode 100755
index 0000000..64e400d
--- /dev/null
+++ b/Biz/Ide/hooks/commit-msg
@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+gitlint --ignore-stdin --staged --msg-filename "$1" run-hook