[CHORE]: Reintegrate `stackgl_modules` into top level library

Description

Reintegrate the stackgl_modules sub-project into the top level library.

Why should this change be made?

This was originally moved to a subfolder in #6004 to allow for supporting older versions of Node and npm. That support is no longer required and moving this back would allow us to simplify the repo a bit.

Scope

• Move dependencies into the root package.json
• Update scripts to handle new location

Notes

• It's possible that it would still be beneficial to leave this folder as is since it segregates some dev dependencies that most people don't need
• This was mentioned as a potential option in #7862

从 root package.json 和 stackgl_modules 子项目开始，然后检查 #6004 中的更改以及 #7862 中提到的替代方案。跟踪引用该子项目的脚本，并运行现有的 build 和 test 命令。完成的标准是从 root 管理依赖项，并且脚本无需受之前的 Node/npm 兼容性限制即可运行。