docs(space-around-number): supplement rule document

Author: NoiseFan

README.md

@@ -121,6 +121,8 @@ export default antfu(
 | Rule | Included in `recommended` | Autofix |
 | --- | --- | --- |
 | `md-style/space-around-inline-element` | ✅ | 🔧 |
+| `md-style/space-around-number` |  | 🔧 |
+| `md-style/space-around-word` |  | 🔧 |
 | `md-style/valid-heading-anchor` | ✅ | 🔧 |
 
 ## Why `@eslint/markdown` Is Required

docs/rules/en/space-around-number.md

@@ -0,0 +1,40 @@
+# Space Around Number
+
+Keep spacing between CJK characters and numbers consistent.
+
+This rule focuses on number-boundary spacing in mixed CJK and technical writing. It prevents CJK characters and numbers from being written directly next to each other, and also removes extra spaces around them.
+
+## Rule Details
+
+By default, this rule requires:
+
+- Exactly one space between a CJK character and an adjacent number
+- Multiple consecutive spaces around numbers to be automatically collapsed into one space
+- No extra spacing requirement when a number is adjacent to punctuation
+- Mixed English-and-number spacing is outside the scope of this rule and must be handled separately
+
+Examples of **correct** code for this rule:
+
+```md
+支持 123 个规则
+提升 4.0% 效率
+版本：2.0，现已发布。
+```
+
+Examples of **incorrect** code for this rule:
+
+```md
+支持123 个规则
+支持 123个规则
+支持123个规则
+提升4.0%效率
+支持  123 个规则
+支持 123  个规则
+支持  123  个规则
+```
+
+This rule is autofixable.
+
+## When Not To Use It
+
+If your project does not want to enforce spacing between CJK characters and numbers, or if this is already handled entirely by another formatter, you can turn this rule off.

docs/rules/zh/space-around-number.md

@@ -0,0 +1,40 @@
+# Space Around Number
+
+保持 CJK 字符与数字之间的空格风格一致。
+
+这条规则主要用于处理中英文混排的数字边界空格问题，避免中文和数字直接粘连，也会清理两侧多余的连续空格。
+
+## 规则详情
+
+默认情况下，这条规则要求：
+
+- CJK 字符与相邻数字之间保留一个空格
+- 如果数字两侧已经存在多个连续空格，会自动压缩为一个空格
+- 如果数字与标点相邻，则不强制要求额外空格
+- 英文与数字之间的混排空格不在这条规则的处理范围内，需要自行处理
+
+该规则的**正确**示例：
+
+```md
+支持 123 个规则
+提升 4.0% 效率
+版本：2.0，现已发布。
+```
+
+该规则的**错误**示例：
+
+```md
+支持123 个规则
+支持 123个规则
+支持123个规则
+提升4.0%效率
+支持  123 个规则
+支持 123  个规则
+支持  123  个规则
+```
+
+该规则支持自动修复。
+
+## 不适用场景
+
+如果你的项目不希望统一中文与数字之间的空格风格，或者这类问题已经完全交给其他格式化工具处理，可以关闭这条规则。