Make and Use Learning Objective dictionary

[schanzer]

For Emmanuel:

• [x] Compile all learning objectives into a single file
• [x] Structure the file to make a JS dictionary where the same prose shows up as the key and in the value
• [x] Make @learning-objective directive, which for now just consumes and produces identical strings. (In the future, the keys will become more key-like and the values will be refined.)
• [x] Replace all LOs in lessons with directives that insert the prose

[flannery-denny]

Looking at that dictionary makes this work feel even more important and the reason to be using dictionaries and directives for this work very clear.

[schanzer]

right???