constify boolean methods
```rs
// core::bool
impl bool {
pub const fn then_some<T: [const] Destruct>(self, t: T) -> Option<T>;
pub const fn then<T, F: [const] FnOnce() -> T + [const] Destruct>(self, f: F) -> Option<T>;
pub const fn ok_or<E: [const] Destruct>(self, err: E) -> Result<(), E>;
pub const fn ok_or_else<E, F: [const] FnOnce() -> E + [const] Destruct>;
}
```
will make tracking issue if pr liked
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| benches | ||
| tests | ||
| Cargo.toml | ||
| lib.rs | ||