Add glossary terms for apple-specific C++'isms

Apple systems support dynamic libraries organized as Frameworks. Because this way of organizing C/C++ code is not cross platform we generally don't recommend or use Frameworks at Mapbox. To clarify that apple systems support both dynamic and static libraries in the same way as other unix systems (and this is our preferred best practice) we should add Frameworks to the glossary to describe how they differ.

找到项目的术语表，并检查附近的条目以确认术语和范围。添加一个 Frameworks 条目，解释 Apple frameworks 与 Mapbox 更倾向使用的动态库和静态库有何不同；当术语表清晰涵盖这一差异且现有指导保持一致时，即视为完成。