Add print method

[ahuang11]

As I was tailoring the AnalystAgent, I wanted to know what was the base prompt to build off from there.

I remember we discussed this before, and I still feel strongly about having a way to examine the prompts without having to open a browser and navigate to the code base, or having to type all of print(lmai.agents.AnalystAgent.prompts["main"]["template"].read_text()) every time I want to read the default prompt (nested dict too which can be confusing to a new user who simply wants to modify the prompt).

Now, it's simplified down to lmai.agents.AnalystAgent.print_prompt_template(), but not sure if need both methods (e.g. get_prompt_template).

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 58.40%. Comparing base (7b1a8bb) to head (1a36a66).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
lumen/ai/actor.py	66.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #948      +/-   ##
==========================================
- Coverage   58.40%   58.40%   -0.01%     
==========================================
  Files         109      109              
  Lines       13914    13921       +7     
==========================================
+ Hits         8127     8131       +4     
- Misses       5787     5790       +3     

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