[AUR-431, AUR-435] Add Agent Interface and ReWOO Agent implementation (#31)

* add base Tool

* minor update test_tool

* update test dependency

* update test dependency

* Fix namespace conflict

* update test

* add base Agent Interface, add ReWoo Agent

* minor update

* update test

* fix typo

* remove unneeded print

* update rewoo agent

---------

Co-authored-by: trducng <trungduc1992@gmail.com>

knowledgehub/pipelines/agents/rewoo/prompt.py

@@ -0,0 +1,119 @@
+# flake8: noqa
+
+from kotaemon.prompt.template import PromptTemplate
+
+zero_shot_planner_prompt = PromptTemplate(
+    template="""You are an AI agent who makes step-by-step plans to solve a problem under the help of external tools.
+For each step, make one plan followed by one tool-call, which will be executed later to retrieve evidence for that step.
+You should store each evidence into a distinct variable #E1, #E2, #E3 ... that can be referred to in later tool-call inputs.
+
+##Available Tools##
+{tool_description}
+
+##Output Format (Replace '<...>')##
+#Plan1: <describe your plan here>
+#E1: <toolname>[<input here>] (eg. Search[What is Python])
+#Plan2: <describe next plan>
+#E2: <toolname>[<input here, you can use #E1 to represent its expected output>]
+And so on...
+
+##Your Task##
+{task}
+
+##Now Begin##
+"""
+)
+
+one_shot_planner_prompt = PromptTemplate(
+    template="""You are an AI agent who makes step-by-step plans to solve a problem under the help of external tools.
+For each step, make one plan followed by one tool-call, which will be executed later to retrieve evidence for that step.
+You should store each evidence into a distinct variable #E1, #E2, #E3 ... that can be referred to in later tool-call inputs.
+
+##Available Tools##
+{tool_description}
+
+##Output Format##
+#Plan1: <describe your plan here>
+#E1: <toolname>[<input here>]
+#Plan2: <describe next plan>
+#E2: <toolname>[<input here, you can use #E1 to represent its expected output>]
+And so on...
+
+##Example##
+Task: What is the 4th root of 64 to the power of 3?
+#Plan1: Find the 4th root of 64
+#E1: Calculator[64^(1/4)]
+#Plan2: Raise the result from #Plan1 to the power of 3
+#E2: Calculator[#E1^3]
+
+##Your Task##
+{task}
+
+##Now Begin##
+"""
+)
+
+
+few_shot_planner_prompt = PromptTemplate(
+    template="""You are an AI agent who makes step-by-step plans to solve a problem under the help of external tools.
+For each step, make one plan followed by one tool-call, which will be executed later to retrieve evidence for that step.
+You should store each evidence into a distinct variable #E1, #E2, #E3 ... that can be referred to in later tool-call inputs.
+
+##Available Tools##
+{tool_description}
+
+##Output Format (Replace '<...>')##
+#Plan1: <describe your plan here>
+#E1: <toolname>[<input>]
+#Plan2: <describe next plan>
+#E2: <toolname>[<input, you can use #E1 to represent its expected output>]
+And so on...
+
+##Examples##
+{fewshot}
+
+##Your Task##
+{task}
+
+##Now Begin##
+"""
+)
+
+zero_shot_solver_prompt = PromptTemplate(
+    template="""You are an AI agent who solves a problem with my assistance. I will provide step-by-step plans(#Plan) and evidences(#E) that could be helpful.
+Your task is to briefly summarize each step, then make a short final conclusion for your task.
+
+##My Plans and Evidences##
+{plan_evidence}
+
+##Example Output##
+First, I <did something> , and I think <...>; Second, I <...>, and I think <...>; ....
+So, <your conclusion>.
+
+##Your Task##
+{task}
+
+##Now Begin##
+"""
+)
+
+few_shot_solver_prompt = PromptTemplate(
+    template="""You are an AI agent who solves a problem with my assistance. I will provide step-by-step plans and evidences that could be helpful.
+Your task is to briefly summarize each step, then make a short final conclusion for your task.
+
+##My Plans and Evidences##
+{plan_evidence}
+
+##Example Output##
+First, I <did something> , and I think <...>; Second, I <...>, and I think <...>; ....
+So, <your conclusion>.
+
+##Example##
+{fewshot}
+
+##Your Task##
+{task}
+
+##Now Begin##
+"""
+)