[Formatter] Do not force indentation style unless certain line length were met

Prerequisites

• I have written a descriptive issue title.
• I have searched all issues to ensure it has not already been requested.

Summary

Formatter always format code as the specified indent style no matter how long the statement is:

# before
$foo = if ($true) {1} else {0}

# after 
$foo = if ($true) {
    1
} else {
    0
}

# expected
$foo = if ($true) { 1 } else { 0 }

The code became too sparse by being enforced to the indentation style.

Proposed Design

No response

使用 issue 中的 PowerShell 示例重现 formatter 的行为，然后定位 formatter 的实现及其现有测试。确定行长度条件应如何影响缩进强制；当短语句在不破坏 formatter 现有行为的情况下保留“expected”下所示的紧凑形式时，即表示完成。