Move prompts into LLMs module (#70)

Since the only usage of prompt is within LLMs, it is reasonable to keep it within the LLM module. This way, it would be easier to discover module, and make the code base less complicated.

Changes:

* Move prompt components into llms
* Bump version 0.3.1
* Make pip install dependencies in eager mode

---------

Co-authored-by: ian <ian@cinnamon.is>

tests/test_prompt.py

@@ -1,9 +1,8 @@
 import pytest
 
 from kotaemon.base import Document
+from kotaemon.llms import BasePromptComponent, PromptTemplate
 from kotaemon.post_processing.extractor import RegexExtractor
-from kotaemon.prompt.base import BasePromptComponent
-from kotaemon.prompt.template import PromptTemplate
 
 
 def test_set_attributes():