v2 ecosystem porting follow-ups and new features

• Port remaining features, commands
• Implement new features

Code

• Configuration support (#79)
• Implement the identity and all the process arou... (#90)

Website

• Improve website’s SEO (#503)
• Doc/Website follow-ups (#486)
• Document Silkaj usage (#479)

Meta

• Add Python v3.15 support and drop Python v3.10 (#508)