Function parseBlockName

parseBlockName(
ctx: ParseContext,
startPos: number,
): { consumed: number; name: string } | null
Parse block name from tokens (handles [[name or [[/name).

Handles underscore suffix like "div_" which may be tokenized as [IDENTIFIER "div"] [UNDERSCORE "_"].
Parameters
- ctx: ParseContext
- startPos: number
Returns { consumed: number; name: string } | null
- Defined in parser/src/parser/rules/common/block-name.ts:9