🎨 Improve performance #1059

[BorghildSelle]

Try to improve performance by;

• using next optimizePackageImports for packages
• try to dynamic import and use absolute path for tree shaking the heavy third party lib hls.js for video streaming
• set prefetch to false on nextlink to avoid assets loads from all links that would be prefetched in next bundles
• minimize the number of routes to build statically to avoid long builds and get back statically generation