Suggestion: writer.pairedWrite(startToken, endToken, newLine, indent, block: () => void)

I like `block()`, `quote()`, etc. But there are other pairings of tokens which are important: parentheses, square brackets, backticks for template strings, etc.

Suggested code:
```typescript
pairedWrite(
startToken: string,
endToken: string,
newLine: boolean,
indent: boolean,
block: () => void
) : void
{
this.write(startToken);
if (newLine) this.newLine();
indent ? this.indent(block) : block();
if (newLine) this.newLine();
this.write(endToken);
}
```

Paired writes could also be useful for (`// #region ...`, `// #endregion ...`) cases.