merge: from readme

app/test/widget_test.dart

flutter/.ci.yaml

flutter/.gitattributes

flutter/.github/ISSUE_TEMPLATE/1_activation.yml

flutter/.github/ISSUE_TEMPLATE/2_bug.yml

flutter/.github/ISSUE_TEMPLATE/3_feature_request.yml

flutter/.github/ISSUE_TEMPLATE/4_performance_others.md

flutter/.github/ISSUE_TEMPLATE/5_performance_speed.yml

flutter/.github/ISSUE_TEMPLATE/6_infrastructure.yml

flutter/.github/ISSUE_TEMPLATE/7_cherry_pick.yml

flutter/.github/ISSUE_TEMPLATE/8_design_doc.yml

flutter/.github/ISSUE_TEMPLATE/9_first_party_packages.yml

flutter/.github/ISSUE_TEMPLATE/config.yml

flutter/.github/PULL_REQUEST_TEMPLATE.md

flutter/.github/dependabot.yml

flutter/.github/labeler.yml

flutter/.github/release.yml

flutter/.github/workflows/coverage.yml

flutter/.github/workflows/labeler.yml

flutter/.github/workflows/lock.yaml