perf: preprocess markdown transform at build time

[ACTCD]

Use custom plugin to divest marked module and preprocess markdown transform

• Use marked to process markdown files at build time instead of runtime

• Facilitate proper tree-shaking to strip marked module in built package

• The plugin is designed to be pluggable and does not affect the source code logic

Compare the build results before and after using the plugin:

xcode/App-Shared/Resources/dist/entry-app-webview.html                  0.56 kB │ gzip:  0.35 kB
xcode/App-Shared/Resources/dist/assets/icon-DCQT6rpB.png               24.31 kB
xcode/App-Shared/Resources/dist/assets/entry-app-webview-Cb_RvQZ2.css   8.94 kB │ gzip:  2.50 kB
xcode/App-Shared/Resources/dist/assets/messages-CmX-0hls.js             2.03 kB │ gzip:  1.68 kB
xcode/App-Shared/Resources/dist/assets/messages-Ckgw66Tb.js             3.93 kB │ gzip:  1.46 kB
xcode/App-Shared/Resources/dist/assets/entry-app-webview-CzCN9MuU.js   37.16 kB │ gzip: 14.97 kB
xcode/App-Shared/Resources/dist/assets/marked.esm-CVsleHkO.js          38.10 kB │ gzip: 11.67 kB

xcode/App-Shared/Resources/dist/entry-app-webview.html                  0.56 kB │ gzip:  0.35 kB
xcode/App-Shared/Resources/dist/assets/icon-DCQT6rpB.png               24.31 kB
xcode/App-Shared/Resources/dist/assets/entry-app-webview-Cb_RvQZ2.css   8.94 kB │ gzip:  2.50 kB
xcode/App-Shared/Resources/dist/assets/messages-B7gXSZyi.js             2.31 kB │ gzip:  1.68 kB
xcode/App-Shared/Resources/dist/assets/messages-BqcmYoef.js             4.31 kB │ gzip:  1.49 kB
xcode/App-Shared/Resources/dist/assets/entry-app-webview-BZoFQhA-.js   36.97 kB │ gzip: 14.87 kB