Add ReadTheDocs documentation page

[Copilot]

Sets up Sphinx-based documentation hosted on ReadTheDocs, with the landing page sourcing content directly from the existing README.md to avoid duplication.

Changes

• .readthedocs.yaml — RTD v2 config; Ubuntu 22.04, Python 3.11, points to docs/conf.py
• docs/conf.py — Sphinx config using sphinx-rtd-theme and myst-parser
• docs/index.md — Landing page that pulls README content via MyST {include}:

  ```{include} ../README.md

• requirements/docs.txt — Pinned deps: sphinx==8.1.3, sphinx-rtd-theme==3.0.2, myst-parser==4.0.0
• docs/_static/.gitkeep — Keeps the static assets directory tracked by Git

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add a readthedocs page</issue_title>
<issue_description>Add the skeleton and config required to host a documentation page using readthedocs. Also, include the information from the readme in the landing page of the readthedocs.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add a readthedocs page #18

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