Adding tool specific docs

docs/tools/WebsiteSearchTool.md

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+# WebsiteSearchTool
+
+## Description
+This tool is specifically crafted for conducting semantic searches within the content of a particular website. Leveraging a Retrieval-Augmented Generation (RAG) model, it navigates through the information provided on a given URL. Users have the flexibility to either initiate a search across any website known or discovered during its usage or to concentrate the search on a predefined, specific website.
+
+## Installation
+Install the crewai_tools package by executing the following command in your terminal:
+
+```shell
+pip install 'crewai[tools]'
+```
+
+## Example
+To utilize the WebsiteSearchTool for different use cases, follow these examples:
+
+```python
+from crewai_tools import WebsiteSearchTool
+
+# To enable the tool to search any website the agent comes across or learns about during its operation
+tool = WebsiteSearchTool()
+
+# OR
+
+# To restrict the tool to only search within the content of a specific website.
+tool = WebsiteSearchTool(website='https://example.com')
+```
+
+## Arguments
+- `website` : An optional argument that specifies the valid website URL to perform the search on. This becomes necessary if the tool is initialized without a specific website. In the `WebsiteSearchToolSchema`, this argument is mandatory. However, in the `FixedWebsiteSearchToolSchema`, it becomes optional if a website is provided during the tool's initialization, as it will then only search within the predefined website's content.