✨ Configuration to adjust terminal line height

### Describe the solution you'd like

This configuration variable will adjust the amount of spacing in between each line. This will be a multiple of the line height itself.

### Examples

| Value | Description |
| - | - |
| 1 | no spacing in between lines |
| 1.5 | a half of a lines height between lines |
| 2 | a full lines height in between lines |

Note: We are not limited to the three values above, they are just examples to illustrate how this will work.

### Related issues

- #1103

檢閱相關的 issue #1103，然後找出 terminal 的實作及其現有的設定處理方式。要求的行為是可設定的行高倍率，其中 1、1.5 和 2 等值會產生 issue 中描述的間距。

由索引模型根據 Issue 內容生成。