Refactor README: reduce AI-style formatting, maintain authentic voice

[Copilot]

Transformed README from informal single-paragraph format into structured documentation while preserving the author's authentic, down-to-earth tone per request. Removed excessive decorative emojis and corporate language that made it feel AI-generated.

Changes

Structure:

• Added clear sections: About, Features, Getting Started, Architecture, Showcase, Roadmap
• Moved full source code into collapsible <details> section
• Added technology badges and quick navigation

Tone adjustments:

• Removed 50+ decorative emojis from headers and bullet points
• Replaced marketing language ("comprehensive solution", "robust framework") with direct statements
• Kept personal voice: "yet another attempt at creating problems for myself", "let's be real – I reworked pretty much everything"
• Simplified headers: "Event-Driven C# Game Engine" instead of "A Modern, Event-Driven C# Game Engine"

Content organization:

• Service architecture explanation with collapsible code examples
• Platform support table for input systems
• Simplified roadmap with Done/Working on/Maybe later sections
• Condensed Getting Started with minimal prerequisites

Result: Professional showcase without corporate/AI feel, ~1,670 lines with all original content preserved.

Original prompt

J'aimerais que tu prenne le contenu du README.md et que tu me fasse une présentation fanxy, sobre, parfaite et pro pour les visiteurs qui viennent. Je veux tout de meme garder le sens de franchise et de terre-a-terre que j'emplois dans mon texte mais j'aimerais que tu me présente ca efficacement et que tu m'ajoute pleins de trucs interessants (pagination, mise en forme, chapitres, layout amélioré, style, etc...) afin que ce soit parfait mais que ca reste dans l'essence de ce qu'il y avait auparavant. Je tiens a faire de ce projet une petite vitrine de mes compétences actuelles et je tiens a ce que tu fasse un beau travail.

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