[Feature Request] Pinned Tabs at the Top of the Side Panel

[ri-zhan]

Description

Having pinned tabs permanently at the top eliminates excessive scrolling to important tabs, especially if we choose to hide the tab bar.

Expected behavior

[Describe what you expected to happen.]

1. I right click a tab on the side panel, option to pin tab shows up
2. I click pin tab on the side panel and it snaps it to the top or bottom where I can easily access without scrolling more.

Screenshots (if applicable)

[Include screenshots or images to help clarify the issue, if applicable.] This is what the Sideberry extension on Firefox looks like with pinned tabs (highlighted in red)