Added DefinitionList and DefinitionItem components

src/components/Content/DefinitionList/DefinitionItem/DefinitionItem.module.css

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+.term {
+  margin-block: var(--el-dt-vspace-top) var(--el-dt-vspace-bottom);
+  padding: var(--el-dt-padding);
+
+  font-family: var(--el-dt-font-family), serif;
+  font-size: var(--el-dt-font-size);
+  font-weight: var(--el-dt-font-weight);
+  line-height: var(--el-dt-line-height);
+  color: var(--el-dt-color);
+  text-transform: var(--el-dt-text-transform);
+  letter-spacing: var(--el-dt-letter-spacing);
+
+  background: var(--el-dt-background);
+}
+
+.def {
+  margin-block: var(--el-dd-vspace-top) var(--el-dd-vspace-bottom);
+  padding: var(--el-dd-indent);
+
+  font-family: var(--el-dd-font-family), sans-serif;
+  font-size: var(--el-dd-font-size);
+  line-height: var(--el-dd-line-height);
+  color: var(--el-dd-color);
+}

src/components/Content/DefinitionList/DefinitionItem/index.tsx

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+import { marked } from 'marked';
+
+import styles from './DefinitionItem.module.css';
+
+interface DefinitionItemProps {
+  term: string;
+  definitions: string[];
+}
+
+export default function DefinitionItem({
+  term,
+  definitions,
+}: DefinitionItemProps) {
+  return (
+    <>
+      <dt className={styles.term}>{term}</dt>
+      {definitions.map((def, idx) => (
+        <dd
+          key={idx}
+          className={styles.def}
+          dangerouslySetInnerHTML={{
+            __html: marked.parseInline(def),
+          }}
+        />
+      ))}
+    </>
+  );
+}

src/components/Content/DefinitionList/DefinitionList.module.css

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+.list {
+  margin-block: var(--el-dl-vspace-top) var(--el-dl-vspace-bottom);
+  font-size: var(--el-dl-font-size);
+  line-height: var(--el-dl-line-height);
+}

src/components/Content/DefinitionList/index.tsx

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+import React from 'react';
+
+import styles from './DefinitionList.module.css';
+
+interface DefinitionListProps {
+  children?: React.ReactNode;
+}
+export default function DefinitionList({ children }: DefinitionListProps) {
+  return <dl className={styles.list}>{children}</dl>;
+}