logging: print text between *** in green (MR 2263)

Highlight messages like the following from pmbootstrap install:
  [19:45:59] *** (1/4) PREPARE NATIVE CHROOT ***

[ci:skip-build]: already built successfully in CI

pmb/helpers/logging.py

@@ -47,6 +47,16 @@ class log_handler(logging.StreamHandler):
                         f"{styles['GREEN']}DONE!{styles['END']}",
                         1,
                     )
+                    .replace(
+                        "*** ",
+                        f"{styles['GREEN']}*** ",
+                        1,
+                    )
+                    .replace(
+                        " ***",
+                        f" ***{styles['END']}",
+                        1,
+                    )
                 )
 
                 stream.write(msg_col)