[GOAL] Make a segment editor

[Mitch]

• Take quill out of the editor and into its own component
• Take in a segment ID or maybe some segment value and onChange callback as props

Start from here:
https://github.com/parrottjrs/think-write/blob/ee68ed7b6b31594804f5df68cbf5c0a63a268ca6/src/pages/Editor.tsx#L11C18-L11C18

In the end:

<SegmentEditor value={segmentContent} onChange={() => ...} isLocked={segment.locked} />

This line:

think-write/src/pages/Editor.tsx

Line 39 in ee68ed7

 <LockedSessions sessions={sessions} /> 

Should look like this:

{sessions.map(() => <SegmentEditor value={segmentContent} onChange={() => ...} isLocked={segment.locked} />)}