v0.6.0

Added

• #[assertr_eq(compare_bounds = "...")] for AssertrEq fields using custom compare_with functions, letting the
  derive macro stay agnostic about the comparison's trait bounds.

Changed

• Breaking: Assertion traits now route diagnostics through an AssertionRenderer<T> (new type state on
  AssertThat, defaulting to DebugRenderer) instead of requiring T: Debug. Use .with_renderer(...) or
  .with_debug_format(...) to render non-Debug values. Some traits gained additional generics, notably
  HashSetAssertions and HashMapAssertions now carry the hasher typeS.
• Breaking: Generated AssertrEq matcher structs now use a custom Debug implementation that prints
  <unrendered> for fields whose type does not implement Debug.

Fixed

• AssertrEq no longer emits renderer bounds for private fields, matching how those fields are excluded from
  comparison.
• Collection comparisons (AssertrPartialEq for slices and maps) now use the active assertion renderer instead of
  always falling back to DebugRenderer.