Support docked dev tools (additionally to floating)

[hediet]

The floating dev tools are very nice, but usually I like to have them just below the page. With VS Code tabs, I always have to move it there.

I like the options edge has in the standalone browser:

Where undocking would be to use a seperate VS Code webview (which is currently the default behavior). For the docked cases, the dev tools would just render in the same web view as the page.

[captainbrosset]

Thanks for the suggestion.