[ty_test] Add use statements to hover.rs
Import InlineFileAssertions, ParsedAssertion, and UnparsedAssertion
at the module level instead of using fully qualified crate::assertion
names throughout the code.
This makes the code cleaner and more idiomatic.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
