Updates README with more comprehensive information.

[jamie-lemon]

No description provided.

[Copilot]

Pull request overview

Expands the project README to provide a more comprehensive landing page for PyMuPDF, including installation guidance, feature highlights, usage examples, FAQs, and links to related projects and documentation.

Changes:

• Adds badges, marketing header, and a reorganized “Why / Installation / Formats / Quick start” structure.
• Introduces extended examples (“Recipes”), FAQ content, and sections for Office/Pro, licensing, and contributing.
• Adds curated documentation links and a “Related projects” table.

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[jamie-lemon]

@JorjMcKie I think all the Co-Pilot suggestions are valid - mostly silly typo stuff, but please let me know what you think too.

[JorjMcKie]

@JorjMcKie I think all the Co-Pilot suggestions are valid - mostly silly typo stuff, but please let me know what you think too.

Yes - the Copilot recommendations are all good to be implemented. I saw no reason to suggest other changes, so we can accept the post-Copilot version.