feat: wire up the parser in the main function

src/frontend/parser.rs

@@ -48,7 +48,7 @@ impl<'src> Parser<'src> {
     }
 
     /// Finish the parsing process returning the errors if any have occured.
-    pub fn finish(self) -> Option<Vec<ParseError>> {
+    pub fn errors(self) -> Option<Vec<ParseError>> {
         (!self.errors.is_empty()).then_some(self.errors)
     }