Enhance shebang handling in REPL and source code execution to preserve line numbers

new_proj.luash

@@ -0,0 +1,21 @@
+#!/usr/bin/env luash
+
+-- Environment variables (clean syntax)
+print("Hello " .. $USER .. "!")
+
+-- Variable assignment  
+$MY_VAR = "some value"
+
+--  Shell commands with backticks
+files = `ls -la`
+current_dir = `pwd`
+
+-- Interactive commands
+!ls
+
+-- The power of Lua + shell
+if `test -f README.md` ~= "" then
+    lines = `wc -l < README.md`
+    print("README has " .. lines .. " lines")
+end
+