feat: add viv shim plus more major refactors

.pre-commit-config.yaml

@@ -4,7 +4,7 @@ default_install_hook_types:
   - pre-commit
   - post-commit
 default_stages:
-  - pre-commit
+  - commit
 repos:
   - repo: https://github.com/psf/black
     rev: 23.3.0

scripts/bump-dev.sh

@@ -1,6 +1,10 @@
 #!/usr/bin/env bash
 TAG=$(git describe --tags --always --dirty=-dev)
 VERSION="${TAG#v}"
+if [ "$NO_VERIFY" ]; then
+	echo 'post-commit hook skipped' 1>&2
+	exit 0
+fi
 if [[ "$(git diff --name-only HEAD HEAD~1)" == *"src/viv/viv.py"* ]]; then
 	sed -i "s/__version__ = \".*\"/__version__ = \"$VERSION\"/g" src/viv/viv.py
 fi