Extensible codecs for V3 (#1588)

* Pull Zarrita into Zarr-Python @ 78274781ad64aef95772eb4b083f7ea9b7d03d06

No code changes to Zarrita were made.

* apply zarr lint rules

* zarrita -> v3

* v3/abc [wip]

* use abcs plus implementation notes

* working on making codecs extensible

* adds index_location

* adds support for codec entry points

* adds tests from zarrita

* fixes types

* Apply suggestions from code review

Co-authored-by: Joe Hamman <[email protected]>

* remove test codec from pyproject.toml

---------

Co-authored-by: Joseph Hamman <[email protected]>
Co-authored-by: Joe Hamman <[email protected]>

Author: normanrz

.pre-commit-config.yaml

@@ -27,11 +27,12 @@ repos:
     hooks:
     - id: check-yaml
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.3.0
+    rev: v1.7.1
     hooks:
       - id: mypy
         files: zarr
         args: []
         additional_dependencies:
           - types-redis
           - types-setuptools
+          - attrs