Add pt-BR docs translation (#3039)

* docs: add pt-br translations

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* Update mcp/overview.mdx brazilian docs

Its en-US counterpart was updated after I did a pass,
so now it includes the new section about @CrewBase

docs/en/tools/file-document/mdxsearchtool.mdx

@@ -0,0 +1,73 @@
+---
+title: MDX RAG Search
+description: The `MDXSearchTool` is designed to search MDX files and return the most relevant results.
+icon: markdown
+---
+
+# `MDXSearchTool`
+
+<Note>
+    The MDXSearchTool is in continuous development. Features may be added or removed, and functionality could change unpredictably as we refine the tool.
+</Note>
+
+## Description
+
+The MDX Search Tool is a component of the `crewai_tools` package aimed at facilitating advanced markdown language extraction. It enables users to effectively search and extract relevant information from MD files using query-based searches. This tool is invaluable for data analysis, information management, and research tasks, streamlining the process of finding specific information within large document collections.
+
+## Installation
+
+Before using the MDX Search Tool, ensure the `crewai_tools` package is installed. If it is not, you can install it with the following command:
+
+```shell
+pip install 'crewai[tools]'
+```
+
+## Usage Example
+
+To use the MDX Search Tool, you must first set up the necessary environment variables. Then, integrate the tool into your crewAI project to begin your market research. Below is a basic example of how to do this:
+
+```python Code
+from crewai_tools import MDXSearchTool
+
+# Initialize the tool to search any MDX content it learns about during execution
+tool = MDXSearchTool()
+
+# OR
+
+# Initialize the tool with a specific MDX file path for an exclusive search within that document
+tool = MDXSearchTool(mdx='path/to/your/document.mdx')
+```
+
+## Parameters
+
+- mdx: **Optional**. Specifies the MDX file path for the search. It can be provided during initialization.
+
+## Customization of Model and Embeddings
+
+The tool defaults to using OpenAI for embeddings and summarization. For customization, utilize a configuration dictionary as shown below:
+
+```python Code
+tool = MDXSearchTool(
+    config=dict(
+        llm=dict(
+            provider="ollama", # Options include google, openai, anthropic, llama2, etc.
+            config=dict(
+                model="llama2",
+                # Optional parameters can be included here.
+                # temperature=0.5,
+                # top_p=1,
+                # stream=true,
+            ),
+        ),
+        embedder=dict(
+            provider="google", # or openai, ollama, ...
+            config=dict(
+                model="models/embedding-001",
+                task_type="retrieval_document",
+                # Optional title for the embeddings can be added here.
+                # title="Embeddings",
+            ),
+        ),
+    )
+)
+```