Components in table/`Grid`: Should be possible to paste from Excel

### Description

This is possibly a tricky/impossible one, but #107 mentions that it should be possible to "import" data via pasting from Excel (or other HTML tables, Word, etc) into our forms. That means, we should analyze the pasted data and see if it could be represented as a table that matches our structure, and allow for the user to paste their data into our table (and in the process, we should automatically create the needed rows), and possibly warn the user if a `Grid` ran out of rows to paste into.

### Additional Information

- #107

Read #107 and inspect the existing table/Grid component to establish current paste and row behavior. Define how Excel or other HTML-table clipboard data should map to the Grid, how rows are created, and how exhaustion is reported; done means the agreed paste scenarios work with appropriate warning behavior.

Written by the indexing model from the issue text.