Plantuml Icon Font Sprites Versions Save

• Breaking change: Moved all generated assets to a new subfolder "icons"
• Added index.html with all icons in one html file
• Added FA6
• Updated FA5 to latest v5.X
• Updated FA4 to latest v4.X
• Updated devicons2 to version v2.16.0
• Repo reorga, devcontainer support, ...
• Updated deps

v2.2.0