Many useful feature are not documented anywere.
We need to write some proper documentation for the general usage of KeePassXC

for example: #127 (comment)

Like we said in the other Issue:

Another feedback we got from the 2.2.0 release is that the documentation for the project is lacking. With this new feature, I'd like to add documentation for the CLI tools we have. What's the plan for us to document the project? The Wiki would be nice, but it's impossible to open PRs on the wiki :(

Yup, I was thinking about documentation as well.
We can open a new repository called wiki and then we can make a script that pushes wiki/master over https://github.com/keepassxreboot/keepassxc.wiki.git for every new commit in wiki/master with a hook like @phoerious did for the website

We should add also a link to docs in the Help toolbar