Implement custom check components and fix linting

apps/workflowengine/src/components/Check.vue

apps/workflowengine/src/components/Checks/FileMimeType.vue

apps/workflowengine/src/components/Checks/FileSystemTag.vue

apps/workflowengine/src/components/Checks/RequestTime.vue

...workflowengine/src/components/Checks/RequestUserAgent.vue

apps/workflowengine/src/components/Checks/file.js

apps/workflowengine/src/components/Checks/request.js

apps/workflowengine/src/components/Operation.vue

apps/workflowengine/src/components/Rule.vue

apps/workflowengine/src/helpers/validators.js

apps/workflowengine/src/legacy/filesystemtagsplugin.js

apps/workflowengine/src/legacy/requesttimeplugin.js

apps/workflowengine/src/legacy/requesturlplugin.js

apps/workflowengine/src/legacy/requestuseragentplugin.js

apps/workflowengine/src/legacy/usergroupmembershipplugin.js

apps/workflowengine/src/store.js