Add vim-extra package

[Nathan Weeks (nathanweeks)]

The vim-extra package adds various features that allow vim to be used more productively, such as plugins and syntax files. For comparison, the GCP, IBM, Oracle, and AWS Cloud Shells all have an equivalent package preinstalled.

Fixes#245

Has an install size of ~35M:

root [ / ]# yum info --installed vim-extra Loaded plugin: tdnfrepogpgcheck Name : vim-extra Arch : x86_64 Epoch : 0 Version : 9.0.2121 Release : 2.cm2 Install Size : 35.34M (37056166) Repo : @System Summary : Extra files for Vim text editor URL : https://www.vim.org License : Vim Description : The vim extra package contains a extra files for powerful text editor. Total Size: 35.34M (37056166)