4.13.0.20260302

What's Changed

• Remove net48 as a direct build target by @shimat in #1829
• Add README to NuGet packages by @shimat in #1831
• fix #1830 by @shimat in #1832
• remove [Pure] attribute by @shimat in #1833
• saving cache by @shimat in #1834
• Refactor wasm CI by @shimat in #1835

Full Changelog: 4.13.0.20260228...4.13.0.20260302