Lib for VS Code extensions installing executables from GitHub

VS Code extensions can use it to get an executable from a GitHub release. This lib is the generalized way of getting the clangd executable to the clang/vscode-clangd to VS Code at runtime.

Forked from clangd/node-clangd@2109d30 with the following changes for VS Code:

• clangd/vscode-clangd@df77d21
• clangd/vscode-clangd@562ad5e
• clangd/vscode-clangd@e82e464
• clangd/vscode-clangd@55d2819

Thank you for the clangd developers. ❤️