Fix typos

[noritaka1166]

Description

I would like to fix the following typos.

• CONTRIBUTING.md
  • L253 finshed → finished
• src/@types/vscode.proposed.languageModels.d.ts
  • L218 & L224 requestor → requester
• src/env/node/git/git.ts
  • L200 overlaping → overlapping
• src/plus/gk/__debug__accountDebug.ts
  • L200 availale → available
• src/plus/integrations/authentication/cloudIntegrationService.ts
  • L90 lastest → latest
• src/plus/integrations/providers/bitbucket/bitbucket.ts
  • L466
    • worning → warning
    • integratin istelf → integration itself
• src/system/-webview/asyncDebouncer.ts
  • L21 implemeted → implemented
  • L100 fullfilled → fulfilled
• src/system/color.ts
  • L639 transparancy → transparency
• src/system/promise.ts
  • L9 & L34 onFullfilled → onFulfilled
• src/webviews/apps/plus/shared/components/account-chip.ts
  • L445 & L448 Ugrade → Upgrade