Clean up and document project files (#4560)

docs/mkdocs/includes/glossary.md

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+<!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary -->
+
+*[ADL]: Argument-dependent lookup
+*[API]: Application Programming Interfaces
+*[ASCII]: American Standard Code for Information Interchange
+*[BDFL]: Benevolent Dictator for Life
+*[BJData]: Binary JData
+*[BSON]: Binary JSON
+*[CBOR]: Concise Binary Object Representation
+*[CC0]: Creative Commons Zero
+*[CI]: Continuous Integration
+*[DOM]: Document Object Model
+*[EOF]: End of File
+*[FAQ]: Frequently Asked Questions
+*[GCC]: GNU Compiler Collection
+*[HTTP]: Hypertext Transfer Protocol
+*[ICC]: Intel C++ Compiler
+*[IEEE]: Institute of Electrical and Electronics Engineers
+*[ISO]: International Organization for Standardization
+*[JSON]: JavaScript Object Notation
+*[MIT]: Massachusetts Institute of Technology
+*[MSVC]: Microsoft Visual C++
+*[MsgPack]: MessagePack
+*[NASA]: National Aeronautics and Space Administration
+*[NDK]: Native Development Kit
+*[NaN]: Not a Number
+*[RFC]: Request for Comments
+*[RTTI]: Runtime Type Information
+*[SAX]: Simple API for XML
+*[SDK]: Software Development Kit
+*[SFINAE]: Substitution failure is not an error
+*[SHA]: Secure Hash Algorithm
+*[SPDX]: Software Package Data Exchange
+*[STL]: Standard Template Library
+*[UBJSON]: Universal Binary JSON
+*[UTF]: Unicode Transformation Format