upgrade to sveltekit v1.0.0

[u-sho]

Close #98

• allow npm 9 or later
• upgrade @sveltejs/kit to 1.0.1 ; for #98
• upgrade @sveltejs/adapter-vercel to 1.0.0
• upgrade svelte to the latest
• upgrade vite from v3 to v4
• add 'data:' to img-src CSP for base64 embedding
• fix: a11y warnings for keyboard users ; for #95
  • add onKeypress event-listener besides onClick
• upgrade linter/formatter dependencies to the latest
• upgrade to svelte-check v3
• upgrade to TypeScript 4.9
  • it supplies satisfies syntax
• replace preprocessor with vitePreprocess
• refactor vscode plugins
  • remove about styled-components
  • update emmet helper
  • ignore cache file of snyk plugin

[vercel[bot]]

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Name	Status	Preview	Updated
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