implement cat script

cc-tweaked/scripts/cat.lua

@@ -1,8 +1,17 @@
-local arg1, arg2, arg3 = ...
+local path = ...
 
 local function main()
-    print("arg1", arg1, "arg2", arg2, "arg3", arg3)
+    if path == nil then
-    local file = fs.open()
+        print("Usage: cat <path>")
+        return
+    end
+    local file = fs.open(path, "r")
+    if file == nil then
+        print("No such file:", path)
+        return
+    end
+    local content = file.readAll()
+    print(content)
 end
 
 main()