Implement Sphinx autodoc for automatic documentation generation from docstrings

[Copilot]

Converts manual RST documentation to Sphinx autodoc to maintain docs in Python docstrings, enabling IDE integration and eliminating duplication between source code and website documentation.

Changes

Docstrings

• Added NumPy-style docstrings to all public classes and methods in presence.py, client.py, baseclient.py, and types.py
• Includes parameter types, descriptions, return values, and usage examples

Sphinx Configuration

• Enabled sphinx.ext.autodoc and sphinx.ext.napoleon extensions
• Configured sys.path for module imports
• Converted presence.rst and client.rst to use .. autoclass:: directives

Infrastructure

• Updated .gitignore to exclude docs/sphinx/_build/
• Added build instructions to DEVELOPMENT.md

Example

Docstrings are now available in IDEs and auto-generated in documentation:

from pypresence import Presence

# IDE shows full docstring with all parameters
RPC = Presence("client_id")
RPC.connect()
RPC.update(
    state="Playing a game",
    details="In main menu",
    large_image="game_logo",
    buttons=[{"label": "Join", "url": "https://example.com"}]
)

Build docs with: cd docs/sphinx && sphinx-build -b html . _build

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Automatic documentation</issue_title>
<issue_description>Would make things easier, right? sphinx (the software we're using right now) comes with autodoc which can build documentation from docstrings. This way, we can have the same docs in the IDE and on the website, making development for end users easy.</issue_description>

<agent_instructions>Basically, move the docs for all public functions into docstrings, then configure sphinx with autodoc</agent_instructions>

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

• Fixes Automatic documentation #268

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