feat(tool): Add husky for git hooks

.husky/commit-msg

@@ -0,0 +1,5 @@
+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+# https://github.com/hyiso/commitlint/issues/6
+sed "s/^fixup! //" < "$1" | dart run commitlint_cli

pubspec.yaml

@@ -6,4 +6,5 @@ environment:
 dev_dependencies:
   commitlint_cli: ^0.4.1
   fvm: ^2.4.1
+  husky: ^0.1.6
   melos: ^3.1.0

tool/setup.sh

@@ -6,3 +6,4 @@ dart pub global activate melos 3.1.0
 dart pub global activate fvm 2.4.1
 echo "y" | fvm install
 melos exec --concurrency=1 flutter pub get
+dart run husky install