fix(esbuild): exclude reveal.js marked plugin

https://github.com/hedgedoc/hedgedoc/pull/4114
did not properly fix the missing speaker notes.

It turns out that by just excluding
reveal.js/plugin/markdown/marked.js
from esbuild processing, we can stop invalid JS from being generated.

Signed-off-by: David Mehren <git@herrmehren.de>

webpack.common.js

@@ -136,12 +136,7 @@ module.exports = {
         {
           context: path.join(__dirname, 'node_modules/reveal.js'),
           from: 'plugin',
-          to: 'reveal.js/plugin',
-          transform (content, path) {
-            // The marked.js script wants a 'exports' variable and is referenced from plugin/notes/notes.html
-            // we copy, so just patch that to give it one.
-            return content.toString().replace('<script src="../../plugin/markdown/marked.js"></script>', '<script>var exports = {};</script><script src="../../plugin/markdown/marked.js"></script>')
-          }
+          to: 'reveal.js/plugin'
         }
       ]
     }),

webpack.prod.js

@@ -17,8 +17,8 @@ module.exports = [
       minimizer: [
         new EsbuildPlugin({
           target: 'es2015',
-          format: "cjs",
-          exclude: ['MathJax/extensions/a11y/mathmaps']
+          format: 'cjs',
+          exclude: ['MathJax/extensions/a11y/mathmaps', 'reveal.js/plugin/markdown/marked.js']
         })
       ],
       splitChunks: {
@@ -33,7 +33,7 @@ module.exports = [
       minimizer: [
         new EsbuildPlugin({
           target: 'es2015',
-          format: "cjs"
+          format: 'cjs'
         }),
         new OptimizeCSSAssetsPlugin({})
       ]