Enhancement: Get link to this cell/selection/tab

[cole-at-quadratic]

Sharing is not as effective as it could be, when you can only share an entire file and not a specific part of it. In Google Sheets, you can right click on a cell (or selection of cells) and select "Get link to this cell" which will copy the unique URL to your clipboard. When clicked, the sheet will load within that specific tab, and focus on that cell.

Google Sheets also allows users to copy their URL bar which will share the file plus the tab they're actively on. This would be extremely helpful for sharing, so users don't have to say "Go to this link, then find tab "xyz"". Especially if there are many tabs, there's no way to easily browse all of them.

[luke-quadratic]

We have an open PR that resolves most of this #2139