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

[luka-nextcloud]

📝 Summary

• Resolves: Table tweaks #2267

🖼️ Screenshots

🏚️ Before	🏡 After
B	A

🚧 TODO

• check if rows and columns can be added / removed and disable buttons accordingly
• 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