Add colors to "ramalama serve" if we can

I don't notice any difference but a lot of things are LOG_INFO in
llama.cpp

Signed-off-by: Eric Curtin <ecurtin@redhat.com>

ramalama/model.py

@@ -50,6 +50,11 @@ with the default RamaLama
 $(error)s"""
 
 
+def should_colorize():
+    t = os.getenv("TERM")
+    return t and t != "dumb" and sys.stdout.isatty()
+
+
 def is_split_file_model(model_path):
     """returns true if ends with -%05d-of-%05d.gguf"""
     return bool(re.match(SPLIT_MODEL_RE, model_path))
@@ -533,6 +538,9 @@ class Model(ModelBase):
             else:
                 exec_args += ["--jinja"]
 
+            if should_colorize():
+                exec_args += ["--log-colors"]
+
             exec_args += [
                 "--alias",
                 self.model,