Enable timestamps for transcripted text

Add `--enable-timestamps` option to `run_client.py`
script to print out transcripted text with timestamps.

Sample output with translation enabled:
```
[0.000 -> 7.440]  And so, my fellow Americans, ask not what your country can do for you.
[7.440 -> 10.300]  Ask what you can do for your country.

TRANSLATION to fr:
[0.000 -> 7.440] Et donc, mes camarades américains, ne demandez pas ce que votre pays peut faire pour vous.
[7.440 -> 10.300] Demandez ce que vous pouvez faire pour votre pays.
```

Signed-off-by: Jeny Sadadia <jeny.sadadia@collabora.com>

whisper_live/utils.py

@@ -11,12 +11,16 @@ def clear_screen():
     os.system("cls" if os.name == "nt" else "clear")
 
 
-def print_transcript(text, translated=False):
+def print_transcript(text, translated=False, timestamps=False):
     """Prints formatted transcript text."""
-    wrapper = textwrap.TextWrapper(width=60)
-    text=" ".join(text) if translated else "".join(text)
-    for line in wrapper.wrap(text=text):
-        print(line)
+    if timestamps:
+        for t in text:
+            print(f'[{t["start"]} -> {t["end"]}] {t["text"]}')
+    else:
+        wrapper = textwrap.TextWrapper(width=60)
+        text=" ".join(text) if translated else "".join(text)
+        for line in wrapper.wrap(text=text):
+            print(line)
 
 
 def format_time(s):