v2.5.1: Performance & Tag Consistency

• V2 Serve at Root: Serves the V2 Elite Edition at the root / of the site, and places the V1 Archive Edition at /v1/. All image paths and navigation cross-links have been fully updated.
• Collapsible Tag Index Sections: Wrapped heavy resource listings under each heading in tags.md inside <details> and <summary> blocks (collapsed by default).
• CSS-Based Deferred Rendering: Added .v2-tag-section CSS styles utilizing content-visibility: auto to defer layout and paint computations for offscreen tag listings.
• Centralized Language Indexing: Grouped Spanish-language and other non-English resources under their own language headings (e.g. ## Spanish Content) in the tag index page.
• Taxonomy Table Color Consistency: Aligned the [SPANISH CONTENT] tag color to md-tag--warning (orange) inside the home page taxonomy table.
• Clickable Filter Anchors: Updated the "Maturity Taxonomy" homepage table to point directly to the correct slug anchors in the technical tags index (e.g. ./tags/#spanish-content).
• Tags Page Performance Lag: Excluded v2_filter.js from executing on the tags index page, resolving browser lockups and main-thread blocking caused by looping over 15,000 DOM elements.
• Duplicate Type Tags: Prevented redundant double-rendering of resource type tags (e.g. [GUIDE]) when they are already listed in the resource's tag metadata.