feat(parsing,parsing_handlers): add API to enhance parsing result (#49)

This PR introduces an API that enables users to augment Tree Sitter's
output, enriching the tree structure with additional information.

parsing_handlers/src/language.rs

@@ -0,0 +1,10 @@
+use crate::{java::get_default_java_parsing_handlers, ParsingHandlers};
+use model::Language;
+
+impl From<Language> for ParsingHandlers {
+    fn from(language: Language) -> Self {
+        match language {
+            Language::Java => get_default_java_parsing_handlers(),
+        }
+    }
+}

parsing_handlers/src/lib.rs

@@ -1,28 +1,5 @@
 mod java;
+mod language;
+mod parsing_handlers;
 
-use java::get_default_java_parsing_handlers;
-use model::Language;
-
-pub type ParsingHandler = fn(root: model::CSTNode) -> model::CSTNode;
-
-pub struct ParsingHandlers {
-    handlers: Vec<ParsingHandler>,
-}
-
-impl ParsingHandlers {
-    pub fn new(handlers: Vec<ParsingHandler>) -> Self {
-        Self { handlers }
-    }
-
-    pub fn run<'a>(&'a self, root: model::CSTNode<'a>) -> model::CSTNode<'a> {
-        self.handlers.iter().fold(root, |acc, handler| handler(acc))
-    }
-}
-
-impl From<Language> for ParsingHandlers {
-    fn from(language: Language) -> Self {
-        match language {
-            Language::Java => get_default_java_parsing_handlers(),
-        }
-    }
-}
+pub use parsing_handlers::{ParsingHandler, ParsingHandlers};

parsing_handlers/src/parsing_handlers.rs

@@ -0,0 +1,17 @@
+use model::CSTNode;
+
+pub type ParsingHandler = fn(root: CSTNode) -> CSTNode;
+
+pub struct ParsingHandlers {
+    handlers: Vec<ParsingHandler>,
+}
+
+impl ParsingHandlers {
+    pub fn new(handlers: Vec<ParsingHandler>) -> Self {
+        Self { handlers }
+    }
+
+    pub fn run<'a>(&'a self, root: CSTNode<'a>) -> CSTNode<'a> {
+        self.handlers.iter().fold(root, |acc, handler| handler(acc))
+    }
+}