Implement basic metrics layout & total elapsed time (#1250)

* Initial metadata processing

* Dynamic coloring and other stuff

* Use -vv / --meta

* More testing

* Cleanup

* Tweek message

Co-authored-by: Jakub Roztocil <jakub@roztocil.co>

tests/utils/matching/tokens.py

@@ -8,6 +8,7 @@ class Expect(Enum):
     """
     REQUEST_HEADERS = auto()
     RESPONSE_HEADERS = auto()
+    RESPONSE_META = auto()
     BODY = auto()
     SEPARATOR = auto()
 
@@ -45,6 +46,10 @@ class ExpectSequence:
         *TERMINAL_REQUEST,
         *TERMINAL_RESPONSE,
     ]
+    TERMINAL_EXCHANGE_META = [
+        *TERMINAL_EXCHANGE,
+        Expect.RESPONSE_META
+    ]
     TERMINAL_BODY = [
         RAW_BODY,
         Expect.SEPARATOR