Add core Error to InvalidDirectionError (#17820)

# Objective

Fixes #17761 

## Solution
- Added core error to InvalidDirectionError

## Testing

- Did you test these changes? If so, how?
- An added test that pulls in anyhow as a dev dependency to ensure the
conversion is accounted for in creation via From
- Are there any parts that need more testing?
  - I'm unsure but probably not due to being a trivial change 
- How can other people (reviewers) test your changes? Is there anything
specific they need to know?
- I did not try a fully built version of Bevy. Relied purely on tests.
- If relevant, what platforms did you test these changes on, and are
there any important ones you can't test?
  - Only windows

---------

Co-authored-by: Chanceler Shaffer <[email protected]>
Co-authored-by: Chanceler Shaffer <[email protected]>

Author: 3 people

crates/bevy_math/src/direction.rs

@@ -15,14 +15,19 @@ use bevy_reflect::{ReflectDeserialize, ReflectSerialize};
 #[cfg(all(debug_assertions, feature = "std"))]
 use std::eprintln;
 
+use thiserror::Error;
+
 /// An error indicating that a direction is invalid.
-#[derive(Debug, PartialEq)]
+#[derive(Debug, PartialEq, Error)]
 pub enum InvalidDirectionError {
     /// The length of the direction vector is zero or very close to zero.
+    #[error("The length of the direction vector is zero or very close to zero")]
     Zero,
     /// The length of the direction vector is `std::f32::INFINITY`.
+    #[error("The length of the direction vector is `std::f32::INFINITY`")]
     Infinite,
     /// The length of the direction vector is `NaN`.
+    #[error("The length of the direction vector is `NaN`")]
     NaN,
 }
 
@@ -41,15 +46,6 @@ impl InvalidDirectionError {
     }
 }
 
-impl core::fmt::Display for InvalidDirectionError {
-    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
-        write!(
-            f,
-            "Direction can not be zero (or very close to zero), or non-finite."
-        )
-    }
-}
-
 /// Checks that a vector with the given squared length is normalized.
 ///
 /// Warns for small error with a length threshold of approximately `1e-4`,