refactor(actions): improve RLE decoding error handling

- Add `DecodeRleError` variant to `ParseActionError` for specific RLE decoding errors

src/actions.rs

@@ -95,7 +95,7 @@ impl FromStr for Actions {
     /// Creates a new `Actions` with LURD format string.
     fn from_str(lurd: &str) -> Result<Self, Self::Err> {
         if lurd.contains(char::is_numeric) {
-            return Actions::from_str(&rle_decode(lurd).unwrap());
+            return Actions::from_str(&rle_decode(lurd)?);
         }
         let mut instance = Actions::default();
         for char in lurd.chars() {

src/error.rs

@@ -52,6 +52,9 @@ pub enum ParseActionError {
     /// Contains non-LURD format character.
     #[error("invalid character: `{0}`")]
     InvalidCharacter(char),
+    /// An error occurred during RLE decoding.
+    #[error(transparent)]
+    DecodeRleError(#[from] DecodeRleError),
 }
 
 /// An error which can be returned when encoding RLE.