* docs(usage): document pricing model matching rules
* docs: refresh user manual for current app support
* docs: clarify Hermes configuration files
* docs: align feature docs with visible app support
Reorganize docs/user-manual/ from flat structure to language subdirectories
(zh/, en/, ja/) with shared assets/. Move existing Chinese docs into zh/,
fix image paths, add multilingual navigation README, and translate all 23
markdown files (~4500 lines each) to English and Japanese.