Optimize find_dependencies results when entity_type=='class'

[LeightonWang]

When calling find_dependencies with entity_type is "class", if the class is inherited from a base class, the tool returns a simple name of the base class instead of the full path of it.

For example, if we parse OpenHands and call find_dependencies:

tools = CodeExploreTools("path/to/OpenHands")
print(tools.find_dependencies(entity_id="openhands.llm.async_llm.AsyncLLM", entity_type="class"))

It returns

Dependencies of class openhands.llm.async_llm.AsyncLLM:
Inherits from following classes:
- LLM

While find_references shows the full paths of the classes inherits from it. So I add some functions to make the return of find_references become

Dependencies of class openhands.llm.async_llm.AsyncLLM:
Inherits from following classes:
- openhands.llm.llm.LLM