To install: download the .zip file. Place it in your mods folder (on Linux: ~/.local/share/0ad/mods/, on Mac: ~/Library/Application\ Support/0ad/mods/, and on Windows: ~\Documents\My Games\0ad\mods\), then unzip it. Turn on the game, go into mod selection, enable EasyAI. Go to the match setup screen, click on the bar that says PetraBot (up next to the civ and color selection stuff), and select EasyAI.
Well, maybe for my last proposal that would have made sense, but before that I posted a list of 20 suggestions, I don't think 20 new threads would have been productive . I'd leave a new thread for a bigger suggestion requiring more discussion, but what do I know.
I can take the opportunity to ask: I really don't know how things work for suggestions to actually be taken into account, some of my suggestions were well received, but that's about it, I don't know what is actually done after that.