An optional tab labeled “Notes” for each Workspace (or note folder with multiple note files), which could be collaborative as well.
I am thinking an a tab on the left or right by user choice along the UI of the (left) Workspace, Navigate, Commands, Changes or the (right) Collaborate, Outline, Debugger. With some simple formatting, like bullets, h tags, bold, italics, strikethrough, etc. or markdown. The point is to see the actual output styles of the note, not just the source code.
I came across this idea running some Wordpress backups that I just wanted to leave notes about as to the backup time and what the backup was related to.
I created a dev-notes.md to do this, but would prefer to have these notes note be an actual file, but still specifc to my workspace.
Example of Markdown Notes @Screenshot