$19\mathrm{.}2\mathrm{.}1$ Detail a comprehensive theoretical framework for a hypothetical urban revitalization project, covering structural engineering, transportation engineering, environmental engineering, and urban planning. Discuss the design principles for high$-$rise buildings ensuring safety and sustainability, propose a transportation plan to mitigate congestion and promote sustainable mobility, outline strategies for environmental sustainability, and develop an urban planning strategy focusing on community engagement and social equity. Emphasize interdisciplinary collaboration and stakeholder engagement while considering ethical considerations and future trends in urban development.