Code refactoring

• misc: Rename new feature development doc to mdx (892a347)
• misc: Some code optimization (47e04fa)

What's improved

• misc: Opening settings copyright i18n (27c5b45)
• misc: Regenerate migrate sql for new agent opening settings (961d6a1)

What's fixed

• misc: Opening questions should should be hidden when no setted (211ee5e)
• misc: Opening settings migration type error (72cf00e)

Styles

• misc: Opening message container add border (63b96c7)