Added a new Chronik block feature with PHP templates to render the timeline design, updated blueprint files to define Chronik-specific fields, and migrated related content into structured formats. Introduced a visually structured timeline with left/right alignment support for chronological events.
Introduced a new FEN block feature, including a PHP snippet to render FEN diagrams, a new CSS file for chessboard styling, font integration, and blueprint updates. Adjusted asset paths and file references for consistency.
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