feat: follow Markdown file links and heading fragments

src/syntax.rs

@@ -9,6 +9,10 @@ use tree_sitter::{
 mod languages;
 use languages::LanguageSpec;
 
+pub(crate) fn is_markdown_path(path: &Path) -> bool {
+    languages::detect(Some(path), None).is_some_and(|syntax| syntax.name == "Markdown")
+}
+
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub enum SyntaxKind {
     Comment,