Module parser/rules/block/blockquote

Block rule for Wikidot-style blockquotes using > markers.

Wikidot blockquotes are written with one or more > characters at the start of a line, followed by a mandatory space and then the content:

> First level
>> Second level
> Back to first
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Key behaviours:

• The depth is determined by the number of consecutive > characters.
• A space after the > markers is required; lines like >No space are consumed but silently discarded from output.
• An empty line (just > ) within the same depth acts as a paragraph separator inside the blockquote.
• Nesting is handled by the generic processDepths utility, which converts flat depth-annotated rows into a recursive tree structure.
• Maximum depth is capped at MAX_BLOCKQUOTE_DEPTH (30) to guard against pathological input.