おまえはもうライブラリいる。なに？！
Toshokan consists of honbako (本箱) that is the frontend application that optionally interact with mori (森) which acts as the server.
To ensure Toshokan can be run standalone without any friction, honbako will store/read data in JSON format on disk although connecting to a mori server instance is highly recommended.
Reinventing the wheel is part of the human culture (refer to my feeble attempt back in 2017!).
Before code and logic duplication start to spiral out of control, Toshokan aims to be a flexible (and opinionated) assets library as seen with Unreal Engine Content Browser, Blender Asset Browser, Unity Project Browser etc.