[WIP] feat(examples): AssemblyScript implementation of median algorithm

[jdvlio]

TODO

• Use the JSONEncoder class for encoding JSON. Currently, this is done manually via raw strings.
• Explicitly (in writing): how do we interface with the allocator and pass in memory buffers?

Build instructions

• The actual source code is the index file in the assembly subdirectory of the Node project directory i.e. examples/as-median. Change to this directory before proceeding
• Install assemblyscript and other dependencies:

  npm update
  

• In order to compile the source, simply run the command

  make build
  

  which, via npm, builds the AssemblyScript (AS) project.

Additional information

• Further detail regarding the build process and toolchain can be found here
• Documentation related to memory operations in AS can be found here
• This blog article was used as a reference point. The AssemblyScript segment starts just past halfway through the article.

[PiDelport]

Can we include a write-up of how this interfaces with the allocator, to actually get buffers into and out of the AssemblyScript code?

Can this branch also update the Rust host do an example call, to pass the data in and out?

[PiDelport]

This should probably be using JSONEncoder, like here?

[jdvlio]

Will make a to-do for that in the PR description