Adding docs for all tools

src/crewai_tools/tools/code_docs_search_tool/README.md

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+# CodeDocsSearchTool
+
+## Description
+The CodeDocsSearchTool is a powerful RAG (Retrieval-Augmented Generation) tool designed for semantic searches within code documentation. It enables users to efficiently find specific information or topics within code documentation. By providing a `docs_url` during initialization, the tool narrows down the search to that particular documentation site. Alternatively, without a specific `docs_url`, it searches across a wide array of code documentation known or discovered throughout its execution, making it versatile for various documentation search needs.
+
+## Installation
+To start using the CodeDocsSearchTool, first, install the crewai_tools package via pip:
+```shell
+pip install 'crewai[tools]'
+```
+
+## Example
+Utilize the CodeDocsSearchTool as follows to conduct searches within code documentation:
+```python
+from crewai_tools import CodeDocsSearchTool
+
+# To search any code documentation content if the URL is known or discovered during its execution:
+tool = CodeDocsSearchTool()
+
+# OR
+
+# To specifically focus your search on a given documentation site by providing its URL:
+tool = CodeDocsSearchTool(docs_url='https://docs.example.com/reference')
+```
+Note: Substitute 'https://docs.example.com/reference' with your target documentation URL and 'How to use search tool' with the search query relevant to your needs.
+
+## Arguments
+- `docs_url`: Optional. Specifies the URL of the code documentation to be searched. Providing this during the tool's initialization focuses the search on the specified documentation content.