feat: image_reader tool url support

[dastagirS]

Description

This PR adds direct url support for the tool "image_reader"

Key Features:

Can analyze images and provide detailed descriptions and evaluations of the images, now with both local path and url
test case for image_url

Implementation Details:

image_path parsing to validate if image_path is url.
if url, fetch image using requests.get.
pass the image.value() as file_bytes.

Related Issues

Documentation PR
Type of Change

• New Tool
  Testing

How have you tested the change? Verify that the changes do not break functionality or introduce warnings in consuming repositories: agents-docs, agents-tools, agents-cli

I ran hatch run prepare

All unit tests pass successfully

All test_image_reader.py tests pass successfully

Code formatting and linting checks pass

No breaking changes to existing functionality

Test Coverage:

Complete unit tests with 27 test functions
Tested locally with agent and passed

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my feature is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature
• My changes generate no new warnings
• Any dependent changes have been merged and published

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