Update JS dependencies (#17611)

- Update monaco, adapting to breaking changes
- Update dropzone, adapting to breaking changes
- Update linters, fix new issues, disable opinionated stylelint rules
- Rebuild SVGs and images
- Tested Dropzone and Monaco

Replaces: https://github.com/go-gitea/gitea/pull/17574

.eslintrc

@@ -368,6 +368,7 @@ rules:
   unicorn/no-array-push-push: [2]
   unicorn/no-console-spaces: [0]
   unicorn/no-document-cookie: [2]
+  unicorn/no-empty-file: [2]
   unicorn/no-fn-reference-in-iterator: [0]
   unicorn/no-for-loop: [0]
   unicorn/no-hex-escape: [0]
@@ -404,6 +405,7 @@ rules:
   unicorn/prefer-date-now: [2]
   unicorn/prefer-default-parameters: [0]
   unicorn/prefer-event-key: [2]
+  unicorn/prefer-export-from: [2]
   unicorn/prefer-includes: [2]
   unicorn/prefer-math-trunc: [2]
   unicorn/prefer-modern-dom-apis: [0]