Migration of old developer docs [TODO]

[drojf]

• Migrate developer wiki https://github.com/07th-mod/higurashi-dev-guides
• Double check the old github hosted developer wiki doesn't contain any additional pages here: https://github.com/07th-mod/higurashi-dev-guides/wiki
• Migrate github hosted higurashi-patch-compiler wiki: https://github.com/07th-mod/higurashi-patch-compiler/wiki