add tracer (#27)

* add tracer

* abc

* fix tracer

* fix example script

* fix example script

* fix

Author: pritamsoni-hsr

overmind_sdk/__init__.py

@@ -7,9 +7,13 @@
 
 from .client import OvermindClient
 from .exceptions import OvermindAPIError, OvermindAuthenticationError, OvermindError
+
 from .tracing import init, get_tracer, set_user, set_tag, capture_exception
 from opentelemetry.overmind.prompt import PromptString
 
+from .tracer import observe, SpanType, function, entry_point, workflow, tool
+
+
 __version__ = "0.1.32"
 __all__ = [
     "OvermindClient",
@@ -22,4 +26,10 @@
     "set_tag",
     "capture_exception",
     "PromptString",
+    "observe",
+    "SpanType",
+    "function",
+    "entry_point",
+    "workflow",
+    "tool",
 ]