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* Fix `System#out` usage pointed by magix at https://github.com/Grasscutters/Grasscutter/pull/568#pullrequestreview-965271278
* Fix typos for interchange `-` and `_`.
* Fix gacha mapping autogeneration path

* GM Handbook
* Gacha Map

* Auto generate mapping files with command `java -jar grasscutter.jar -gachamap`

* Static file provider
  * For gacha record webpage
  * All static files should be stored at `GRASSCUTTER_RESOURCE/gcstatic/`
  * Can benefit other subsystem in future when webpages involved

This reverts commit 215ee2a3.

This fixes potential output issues for non-Latin scripts when exporting the handbook by changing the filename in the code.