docs: let the page use the full viewport width

[vringar]

Alabaster centres a fixed 940px page by default, so the navigation sidebar floats in the middle of the screen and wide content is squeezed into a narrow column. The requirements matrix in developers/Stealth-Requirements.rst is the worst case — a wide table wrapped into roughly a third of a modern display.

html_theme_options = {
    "page_width": "100%",
    "sidebar_width": "260px",
}

page_width and sidebar_width are alabaster's own options, confirmed against the installed theme's theme.conf. There was no html_theme_options block at all before this, so the theme was running entirely on defaults.

The sidebar ends up flush against the left edge and the body takes the remaining width.

One caveat on reviewing this: the effect is most visible on pages that #1154 adds, so the Read the Docs preview for this PR shows the change against the current docs only.

[Copilot]

🟢 Approval recommended

The change is small and low-risk, with only a minor doc-comment clarity issue noted.

Pull request overview

Adjusts the Sphinx docs theme configuration so OpenWPM’s documentation uses the full viewport width, avoiding Alabaster’s default centered fixed-width layout that squeezes wide content (e.g., large tables).

Changes:

• Add html_theme_options for the Alabaster theme to set page_width to 100%.
• Set a fixed sidebar_width to keep the navigation consistent while letting the body expand.

File summaries

File	Description
docs/conf.py	Configures Alabaster theme options to use full-width pages with a fixed-width sidebar.

Review details

• Files reviewed: 1/2 changed files
• Comments generated: 1
• Review effort level: Lite

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 62.31%. Comparing base (975b09c) to head (6e0f811).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1231   +/-   ##
=======================================
  Coverage   62.31%   62.31%           
=======================================
  Files          40       40           
  Lines        3930     3930           
=======================================
  Hits         2449     2449           
  Misses       1481     1481           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.