MAINT Subclass recipe builders (#36)

Subclasses RecipeBuilder based on the package type. This is to make it
easier to distinguish between behavior that varies by package type. No
functional changes intended.

I'll update the `buildall.py` as a follow-up.

I also removed prettier from the pre-commit, which I don't think is very
useful for pyodide-build.

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.pre-commit-config.yaml

@@ -73,10 +73,5 @@ repos:
         files: ^(conftest.py|src/tests|pyodide-build/pyodide_build/tests)
         additional_dependencies: *mypy-deps
 
-  - repo: https://github.com/pre-commit/mirrors-prettier
-    rev: "v4.0.0-alpha.8"
-    hooks:
-      - id: prettier
-
 ci:
   autoupdate_schedule: "quarterly"