source-control: add more details for working with issues

[practicalli-johnny]

Extend the current content for Octo to include step by step details for

• creating an issue
• commenting on an issue
• updating an issue
• C-r to refresh an issue, e.g. when updated outside of Neovim or if editing issue in Neovim and the red change line is not updating

:w command seems to sync reliably but not so much SPC w. More testing is required.

Include gh commands that are not yet implemented in Octo

Edit issue number 80 and add yourself @me to the Assignees meta data:

gh issue edit 80 --add-assignee "@me" 

Set the default repository to use for issues (if there are more than one and origin isnt used). A popup appears with a list of remotes to choose from.

gh repo set-default

Add a label

Add a type

e.g. set Type to doc

Add to Project