Move RequestFeebackAlert into own file, make errror heading Alert.Heading (instead of <strong>)

[kiriDevs]

• style: Make error alert heading an Alert.Heading
• dev(gp): Make use of nvmrc during node install for GitPod
• Revert "dev(gp): Make use of nvmrc during node install for GitPod"
• style: Move RequestFeedback Alert into its own file