Added tons of AI generated docs and a lot of cleanups. No code changes. (0.41.5)

src/repl.h

@@ -1,3 +1,16 @@
+/**
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ */
+ 
+/**
+ * @file repl.h
+ * @brief Interactive Read-Eval-Print Loop (REPL) entry point.
+ */
 #ifndef FUN_REPL_H
 #define FUN_REPL_H
 
@@ -8,8 +21,16 @@ extern "C" {
 #endif
 
 #ifdef FUN_WITH_REPL
-// Runs the interactive REPL using the provided, already-initialized VM.
-// Returns 0 on normal exit.
+/**
+ * @brief Run the interactive REPL using an already-initialized VM.
+ *
+ * Reads lines from stdin, evaluates them in the provided VM context, and
+ * prints results/errors. The function returns on EOF or when the user issues
+ * a quit command supported by the REPL implementation.
+ *
+ * @param vm Pointer to an initialized VM; must not be NULL.
+ * @return 0 on normal exit, non-zero on fatal error.
+ */
 int fun_run_repl(VM *vm);
 #endif