Updated README

[larsll]

Public API Changes
None

Description
This pull request updates the README.md file for the web_video_server project. The changes include a comprehensive reorganization and enhancement of the documentation to provide clearer instructions and additional details about the features, installation, usage, and configuration of the project.

Documentation improvements:

• Enhanced the project description to clarify the purpose and capabilities of the web_video_server node.
• Added a detailed "Features" section listing the supported streaming formats and capabilities.
• Expanded the "Installation" section to include dependencies, package installation instructions for ROS2 distributions, and steps for building from source for both ROS 1 and ROS 2.
• Introduced a "Usage" section with instructions for starting the server, configuring server parameters, and viewing available streams.
• Provided detailed instructions and examples for streaming image topics, including URL parameters for customizing the streams and obtaining snapshots.

[bjsowa]

Thanks you so much for this and sorry for not reviewing this sooner

[larsll]

Thanks you so much for this and sorry for not reviewing this sooner

You are welcome. Your suggestions have been applied. Ready to merge I'd say!