chore: release v0.0.4

[github-actions]

🤖 New release

• tonstruct: 0.0.3 -> 0.0.4 (⚠ API breaking changes)

⚠ tonstruct breaking changes

--- failure struct_missing: pub struct removed or renamed ---

Description:
A publicly-visible struct cannot be imported by its prior path. A `pub use` may have been removed, or the struct itself may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.40.0/src/lints/struct_missing.ron

Failed in:
  struct tonstruct::fields::Comment, previously in file /tmp/.tmp3qssEe/tonstruct/src/types/comment.rs:7
  struct tonstruct::fields::CellRef, previously in file /tmp/.tmp3qssEe/tonstruct/src/types/cell_ref.rs:7

--- failure trait_method_missing: pub trait method removed or renamed ---

Description:
A trait method is no longer callable, and may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#major-any-change-to-trait-item-signatures
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.40.0/src/lints/trait_method_missing.ron

Failed in:
  method to_cell of trait ToCell, previously in file /tmp/.tmp3qssEe/tonstruct/src/to_cell.rs:4
  method from_cell of trait FromCell, previously in file /tmp/.tmp3qssEe/tonstruct/src/from_cell.rs:4

--- failure trait_newly_sealed: pub trait became sealed ---

Description:
A publicly-visible trait became sealed, so downstream crates are no longer able to implement it
        ref: https://rust-lang.github.io/api-guidelines/future-proofing.html#sealed-traits-protect-against-downstream-implementations-c-sealed
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.40.0/src/lints/trait_newly_sealed.ron

Failed in:
  trait tonstruct::ToCell in file /tmp/.tmpptGspu/tonstruct/src/to_cell.rs:14
  trait tonstruct::FromCell in file /tmp/.tmpptGspu/tonstruct/src/from_cell.rs:16

--- failure trait_no_longer_dyn_compatible: trait no longer dyn compatible ---

Description:
Trait is no longer dyn compatible, which breaks `dyn Trait` usage.
        ref: https://doc.rust-lang.org/stable/reference/items/traits.html#object-safety
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.40.0/src/lints/trait_no_longer_dyn_compatible.ron

Failed in:
  trait ToCell in file /tmp/.tmpptGspu/tonstruct/src/to_cell.rs:14

Changelog

0.0.4 - 2025-05-01

Added

• update crate architecture (#39)
• add From<{int}> trait for Coins, Int, Uint structs (#35)

Other

• update CI shield source (#40)
• init examples directory (#33)

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This PR was generated with release-plz.