Polish Release

What's Changed

• Change Sync by @eoussama in #56
• Change Sync by @eoussama in #57
• Added Version Badge by @eoussama in #58
• Change Sync by @eoussama in #59
• Refresh by @eoussama in #61
• docs: add Firebase authorized domains note to README by @eoussama in #63
• Fea/64 playground by @eoussama in #65
• Popup Errors by @eoussama in #67
• Multiple Providers by @eoussama in #69
• feat: iframe embedding support by @eoussama in #72
• feat: add background color to theme configuration by @eoussama in #73
• chore: playground cleanup and UX improvements by @eoussama in #75
• doc: Documentation by @eoussama in #76
• Polish Release by @eoussama in #77

Full Changelog: 0.1.5...0.1.6