chore(x/tx): Update changelog for x/tx v0.7.0

[kocubinski]

Description

This will be tagged x/tx/v0.7.0

---

Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.

I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.

I have...

• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[aaronc]

API breaking changes should result in a bump to 0.7.0. Let's address the other issues which will also require API breakage so that NewEncoder takes an Options struct and then we can bump to 0.7.0

[kocubinski]

API breaking changes should result in a bump to 0.7.0. Let's address the other issues which will also require API breakage so that NewEncoder takes an Options struct and then we can bump to 0.7.0

I don't see NewEncoder Options related to this work stream, please review the latest in #16036 to see if this is acceptable.

[aaronc]

API breaking changes should result in a bump to 0.7.0. Let's address the other issues which will also require API breakage so that NewEncoder takes an Options struct and then we can bump to 0.7.0

I don't see NewEncoder Options related to this work stream, please review the latest in #16036 to see if this is acceptable.

All that stuff should be handled in x/tx - it's what we promised we would deliver already. So it has higher priority

[tac0turtle]

utACK

[kocubinski]

implemented in #16048