Release v1.0.0

Finally, we reach v1.0! 🎉🎉

• Support sync stable/nightly std search index automatically. There is no extension updating required to get the latest search index after v1.0.
• Support prefix ? and ?? to search caniuse.rs and RFC respectively. Thanks the PR from @aquarhead.
• Upload the latest index files to the update page once a day, those index including:
  • Command index
  • Book index
  • Clippy lint index
  • Caniuse index
  • Github rust-lang/rust repository label index
  • Top 20K crate index
• Support configure auto index-updating in the popup page
• New commands:
  • :stats: open search statistics page
  • :update: open the update page to sync the latest index automatically
• Bugfix:
  • Fix docs.rs SVG icon missing issue
  • Fix docs.rs new header bar UI compatibility