refactor: update transaction type handling

[alexbarnsley]

Summary

https://app.clickup.com/t/86dv4f3wp

requires/merging into #999 as the homepage is currently broken without it

todo:

• remove sub-category - relies on the isLegacy method which should no longer be applicable
• follow on from above - remove isLegacy handling
• handle voted validator?
• handle unvoted validator? - trickier as the validator isn't passed into the contract method
• remove or comment out other transaction types which aren't supported yet
• show method hash if no match for transaction type
• address wrapping on vote tooltips

Checklist

• I checked my UI changes against the design and there are no notable differences
• I checked my UI changes for any responsiveness issues
• I checked my UI changes in light AND dark mode
• I checked my (code) changes for obvious issues, debug statements and commented code
• I opened a corresponding card on Clickup for any remaining TODOs in my code
• I added a short description on how to test this PR (if necessary)
• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged