More keyboard shorcut UI stuff

[shermanhuman]

Description

More keyboard shortcut and related UI improvements. See screenshots.

Added a Glyph component to make adding references to UI bits in inline help text a bit easier. Right now all it does is the 'New Session' button, but the idea is we can add the other buttons and such as needed.

Example:

 No past sessions found. To start a new session, either click the <Glyph>+</Glyph>
          button or use the keyboard shortcut: <kbd>{getMetaKeyLabel()}</kbd> + <kbd>L</kbd>

What's the plan for colors? I used the vscode css vars:

color: --vscode-editor-foreground;

or copied what I saw in the code:

background-color: ${lightGray}33;

Checklist

• The relevant docs, if any, have been updated or created
• The relevant tests, if any, have been updated or created

Screenshots

Images are 'before' then 'after'.

gui\src\components\mainInput\TutorialCard.tsx

gui\src\components\modelSelection\ModelSelect.tsx

extensions\vscode\src\commands.ts
extensions\vscode\src\util\util.ts

gui\src\components\History\index.tsx

Testing instructions

Screenshots are from Windows 11.

[netlify]

✅ Deploy Preview for continuedev ready!

Name	Link
🔨 Latest commit	9393314
🔍 Latest deploy log	https://app.netlify.com/sites/continuedev/deploys/679e9ff8b22311000854141e
😎 Deploy Preview	https://deploy-preview-3929--continuedev.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[shermanhuman]

On Mac the Command button is a little small. I'll fix it.

[shermanhuman]

I'm reworking things, and will resubmit.