[fine] Re-work compiler main, checking is everything

fine/src/main.rs

@@ -1,37 +1,8 @@
-use fine::parser::parse;
-use fine::semantics::Semantics;
 use std::env;
-use std::fs;
-
-pub fn process_file(file: &str) {
-    let source = match fs::read_to_string(file) {
-        Ok(c) => c,
-        Err(e) => {
-            eprintln!("Unable to read file {file}: {e}");
-            return;
-        }
-    };
-
-    // What am I doing here?
-    let (tree, lines) = parse(&source);
-    let semantics = Semantics::new(&tree, &lines);
-
-    // This is... probably wrong, I don't know, what am I doing?
-    for t in tree.trees() {
-        let _ = semantics.type_of(t);
-    }
-
-    // OK now there might be errors.
-    let mut errors = semantics.snapshot_errors();
-    errors.reverse();
-    for e in errors {
-        eprintln!("{file}: {}:{}: {}", e.start.0, e.start.1, e.message);
-    }
-}
 
 pub fn main() {
     let args: Vec<String> = env::args().collect();
     for arg in &args[1..] {
-        process_file(arg);
+        fine::process_file(arg);
     }
 }