CAN should fire a SCRATCHFILE_PARSED event when the scratchfile is parsed

CAN should parse the scratchfile once it has been updated. Once CAN has successfully parsed the scratchfile, the SCRATCHFILE_PARSED event should be fired, with the AST included as an argument. To allow other parts of the software to respond.

If the parsing is not successful, CAN should fire a SCRATCHFILE_ERROR event.

Backlinks

• When the SCRATCHFILE_PARSED event is fired CAN should hash the AST
  • CAN should fire a SCRATCHFILE_PARSED event. When this happens, CAN should make a digest of the AST. CAN will use SHA3-512 digests and will use multihash to encode digests. For now no check needs to be performed around which hashing algorithm is used, as there's only one implemented.
• CAN should parse the scratchfile when it is updated
  • CAN should fire a SCRATCHFILE_PARSED event when the scratchfile is parsed. CAN should fire a SCRATCHFILE_ERROR event if unsupported syntax is found. This could be an error in the parsing step (CAN will use remark to process markdown) or markdown that CAN does not explicitly support - CAN notes are written in a subset of markdown. When a SCRATCHFILE_ERROR is emitted, CAN should inform the user