chore: upgrade to Go 1.24 and add support for *types.Alias

[fujiwara-manabu-0516]

• bump Go version to 1.24
• update code handling for *types.Alias introduced in 1.24

We would greatly appreciate it if you could review and merge this PR at your convenience.
Thank you very much for your time and support!

[54m]

Thank you very much for the contribution and for raising attention to this issue!

Released v0.5.0 (#78), which addresses the same *types.Alias panic you reported here. The implementation in v0.5.0 uses types.Unalias() instead of Underlying(), because Underlying() strips not only the alias layer but also the named-type layer. That would silently break special handling for named types — most notably time.Time aliases would lose their Date conversion, and type Foo = SomeStruct would be inlined as an anonymous struct instead of being treated as a reference to SomeStruct

In addition to *types.Alias, v0.5.0 also covers *types.Signature and *types.TypeParam (both falling back to Any{}), Go 1.24+ generic type aliases (type Vec[T any] = []T), and clarifies the panic message wording

Closing in favor of #78. Thanks again for prompting the fix!