Introduce a new CharacterPrompts extension: adds node implementations (Character Create, Character Edit/Delete, Character Prompt Encode) with storage, resolver, and README. Adds persistent character library storage (default/ComfyUI-CharacterPrompts-MXD/characters.json), server route (/mxd/characters/list), and a web UI integration (mxd_character_prompts.js + import) to refresh/pick characters in the graph. Update root __init__ to register the new module. Also remove the Grow Blur Mask MXD node from maxedoutnodes, and bump package version to 1.9.0 in pyproject.toml.
Maxed-Out-99
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