Table.input for pasting tabular data

[vitvakatu]

Pull Request Description

Closes #11350

• Copy/pasting tabular data now creates Table.input nodes.
• Column names are always copied when you work inside Enso (excluding cases when you paste some cells into an existing table)
• When working with external apps, column names are copied only if Copy with headers is selected.

copy-paste.mp4

Roundtrip with Google Spreadsheets (shows non-trivial TSV data that includes quotes and newlines):

roundtrip-to-excel.mp4

Important Notes

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
  Scala,
  Java,
  TypeScript,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• Unit tests have been written where possible.
• If meaningful changes were made to logic or tests affecting Enso Cloud integration in the libraries,
  or the Snowflake database integration, a run of the Extra Tests has been scheduled.
  • If applicable, it is suggested to paste a link to a successful run of the Extra Tests.

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