feat(table): add row, column buttons outside of table

[luka-nextcloud]

📝 Summary

• Resolves: #2267

🖼️ Screenshots

🏚️ Before	🏡 After
B	A

🚧 TODO

• [x] check if rows and columns can be added / removed and disable buttons accordingly
• [x] drop colspan=1, rowspan=1, etc from rendered html - first attempt at this failed

🏁 Checklist

• [ ] Code is properly formatted (npm run lint / npm run stylelint / composer run cs:check)
• [ ] Sign-off message is added to all commits
• [ ] Tests (unit, integration and/or end-to-end) passing and the changes are covered with tests
• [ ] Documentation (README or documentation) has been updated or is not required

[juliusknorr]

Seems like a user interface change so please provide some screenshots ;)

[luka-nextcloud]

Yes, I will. It's not yet ready for review.

[luka-nextcloud]

Screenshot & video

demo.webm

[luka-nextcloud]

@nextcloud/designers Could you please give me your feedback regarding the button? :)

[luka-nextcloud]

demo.webm