WIP: Add decimal separator prop (#12329)

* Add decimal separator prop

* Update API reference

components/input-number/index.en-US.md

@@ -22,6 +22,7 @@ When a numeric value needs to be provided.
 | min | min value | number | -Infinity |
 | parser | Specifies the value extracted from formatter | function( string): number | - |
 | precision | precision of input value | number | - |
+| decilamSeparator | decimal separator | string | - |
 | size | width of input box | string | - |
 | step | The number to which the current value is increased or decreased. It can be an integer or decimal. | number\|string | 1 |
 | value | current value | number |  |

components/input-number/index.tsx

@@ -20,6 +20,7 @@ export interface InputNumberProps extends Omit<React.InputHTMLAttributes<HTMLInp
   size?: 'large' | 'small' | 'default';
   formatter?: (value: number | string | undefined) => string;
   parser?: (displayValue: string | undefined) => number;
+  decimalSeparator?: string;
   placeholder?: string;
   style?: React.CSSProperties;
   className?: string;

components/input-number/index.zh-CN.md

@@ -25,6 +25,7 @@ title: InputNumber
 | min | 最小值 | number | -Infinity |
 | parser | 指定从 formatter 里转换回数字的方式，和 formatter 搭配使用 | function( string): number | - |
 | precision | 数值精度 | number | - |
+| decimalSeparator | 小数点 | string | - |
 | size | 输入框大小 | string | 无 |
 | step | 每次改变步数，可以为小数 | number\|string | 1 |
 | value | 当前值 | number |  |