docs: add setup guideline

[vdhieu]

• [x] dotfiles
• [x] terminal
  • [x] zsh + plugins
• [x] Editor setup:
  • [x] vscode,
  • [x] vim extensions @Tom X Nguyen
• [x] apps, useful plugins
• [x] Git setup: git config, ssh config

[monotykamary]

• Upgrade standard of prose and descriptions
• Relate/reflect more to practices existing in company