Rename DirectoryDescription to ThingDirectory

[benfrancis]

This PR proposes renaming DirectoryDescription to ThingDirectory as discussed in #133 and #43

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Preview | Diff

[mmccool]

@farshidtz suggests we apply refactoring PRs to a branch first to make sure they collectively don't break the spec while we are working on them. I created a branch ("refactor") but @benfrancis needs to redirect his PRs to it.

[benfrancis]

@mmccool Hmm, which commits do you want to see combined? Can I suggest just cherry-picking the ones you want to see combined in a local clone? A refactor branch sounds like it will create more work.

If it helps you can see the combined result of my four PRs here and a rendered version here.

[farshidtz]

It isn't about the commits. The suggestion is to change the target branch of all your refactoring PRs (#158, #159, #160, #161) from main to refactor.

This way, we can merge those PRs and fix the relevant text and ontology without breaking the draft spec that is served from main.

[benfrancis]

The suggestion is to change the target branch of all your refactoring PRs (#158, #159, #160, #161) from main to refactor.

Done.