feat: kyoto bootstrap view

[reez]

Description

Adding a message when kyoto is bootstrapping initially

Notes to the reviewers

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]

@rustaceanrob one of the last things I needed to do for kyoto, add this message we talked about, feel free to let me know if any tweaks to wording

basic logic of when to show it are https://github.com/bitcoindevkit/BDKSwiftExampleWallet/pull/335/files#diff-ac3d07e4d2cd28d03c9e1e008d7eacc6ab28f8283c1679e4b102c8bcd072d472R237-R241

[rustaceanrob]

Perfect! Nice job