refactor: extract BalanceView to simplify WalletView and modularize b…

[r1b2ns]

Description

This PR simplifies WalletView by extracting the balance information into a separate BalanceView component.

Changelog notice

Checklists

All Submissions:

• I've signed all my commits
• I followed the contribution guidelines
• I have formatted my code with swift-format per .swift-format file

New Features:

• I've added tests for the new feature
• I've added docs for the new feature
• UI changes tested on small, medium, and large devices to ensure layout consistency

Bugfixes:

• This pull request breaks the existing API
• I've added tests to reproduce the issue which are now passing
• I'm linking the issue being fixed by this PR

[reez]

1. Would remove all changes in BDKSwiftExampleWallet.xcodeproj/project.pbxproj other than BalanceView.swift addition.

2. And then in the PR template I see I have formatted my code with [swift-format](https://github.com/apple/swift-format) per .swift-format [file](https://github.com/reez/BDKSwiftExampleWallet/blob/main/.swift-format) checked but I dont see that the code was formatted (can just run swift format --in-place --recursive . locally to fix though)

Otherwise the rest is looking good when I tested it!

[r1b2ns]

I was thinking — if you want, I can configure XcodeGen to generate the .xcodeproj. What do you think?

[reez]

I was thinking — if you want, I can configure XcodeGen to generate the .xcodeproj. What do you think?

I think at some point we will do that, but I think we are going to wait on doing that. But its a good thought that makes sense.

[r1b2ns]

Awesome! I’ve made the changes to move this PR forward.