Add tf string checking

bin/tflocal

@@ -225,7 +225,7 @@ def filter_configs(configs: dict) -> dict:
 def generate_additional_configs(configs, indent=1) -> str:
     result = ""
     for argument, value in configs.items():
-        if isinstance(value, str):
+        if isinstance(value, str) and not check_tf_string(value):
             value = f'"{value}"'
 
         if isinstance(value, list):
@@ -398,6 +398,15 @@ def run_tf_subprocess(cmd, env):
     PROCESS.communicate()
     sys.exit(PROCESS.returncode)
 
+def check_tf_string (expr: str) -> bool:
+    tf_prefixes = ("var.", "data.", "local.", "module.", "output.")
+    if expr in ("true","false"):
+        return True
+    if expr.startswith(tf_prefixes):
+        return True
+    if "(" in expr:
+        return True
+    return False
 
 # ---
 # UTIL FUNCTIONS