feat: remove source image in public to prevent leakage (#278)

* refactor: change hires loader function name

* feat: add loading transition animation and improve performance

* feat: hide image source in exampleSite

* docs: update docs for publishResources

exampleSite/content/Webb/index.md

@@ -8,4 +8,6 @@ menu:
     identifier: Webb
     title: Webb
 unifiedAlt: '© Alex Webb'
+_build:
+  publishResources: false
 ---