feat: section title 공통 컴포넌트 작성

src/components/SectionTitleV2/SectionTitleV2.tsx

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+import { ReactNode } from 'react';
+import { css, SerializedStyles, Theme } from '@emotion/react';
+
+interface SectionTitleV2Props {
+  children: ReactNode;
+  style?: SerializedStyles | ((theme: Theme) => SerializedStyles);
+}
+
+export function SectionTitleV2({ children, style }: SectionTitleV2Props) {
+  return <div css={[sectionTitleCss, style]}>{children}</div>;
+}
+
+const sectionTitleCss = css`
+  display: flex;
+  width: 100%;
+  height: 40px;
+  padding: 12px 24px;
+  justify-content: center;
+  align-items: center;
+  gap: 4px;
+`;

src/components/SectionTitleV2/index.tsx

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+export { SectionTitleV2 } from './SectionTitleV2';