Add link to rust benchmarks to the docs

[ppinchuk]

@castelao Anything we should add/change/remove about the text? Also, do we need to move it up to be it's own main section or is it ok under "Miscellaneous"?

I wanted to have a link for the benchmarks easily accessible from the documentation pages.

[Copilot]

Pull Request Overview

This PR adds documentation about Rust benchmarks to the developer guide and standardizes docstring formatting across several files. The main purpose is to provide developers with easy access to performance benchmarking information for the Rust-based routing algorithm.

Key changes:

• Added a new "Rust Benchmarking" section to the developer documentation with a link to benchmark results
• Standardized docstring formatting by replacing quoted strings with proper reStructuredText code formatting

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
docs/source/dev/README.rst	Added new section documenting Rust benchmarks with link to GitHub Pages
revrt/spatial_characterization/zonal.py	Updated docstring formatting from quotes to reStructuredText code blocks
revrt/spatial_characterization/stats.py	Updated docstring formatting from quotes to reStructuredText code blocks
revrt/spatial_characterization/cli.py	Updated docstring formatting from quotes to reStructuredText code blocks
revrt/costs/dry_costs_creator.py	Added code block formatting to docstring example

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[castelao]

I think the Miscellaneous is the right place.

Eventually, we might remove it from README, if it gets too large, and have references in the documentation and specific guidance on how to use it in the development.