Request more tools on Arch boxes (no mosh edition)

This is everything from !481 (closed) minus mosh, which is controversial. Even if it does get approved it would need special handling like firewall rules, so I decided isolating it will make this easier to review and move forward.

From original MR:

2. While I was adding that, I also noticed my favorite diff viewer, delta is not available. Seeing as how bat and colordiff and similar tools are, I figured it wouldn't hurt to suggest that too.

3. The myrepos perl script is great for managing functions across an assortment of repositories (whether svn/git/whatever). This is already proving quite useful to keep track of various modules in sparse svn repository checkouts.

4. The odds and ends in moreutils are things I find useful while messing about with packaging on a daily basis.

5. Lastly I saw GNU stow is there for dotfile management, but I use vcsh and would like to request it. Others might appreciate yadm, chezmoi, or others but perhaps adding them when somebody is actually going to use them is better so I didn't add them. VCSH at least can be 'installed' from user space –which I'm happy to do for use in managing shell aliases, editor rc files, etc.– but it seems like I might not be the only one that would find it useful.