Improve prism.js highlighting

- plugin changes:
  - add `show-language` + `toolbar` plugins: Shows the language of the current codeblock.
  - add `autoloader`: Used to automatically load languages.
  - add `match-braces`: when hovering over a bracket, highlight the matching bracket.
    Added match-braces class to `base.ftl`.
  - add `diff-highlight`: highlight diff codeblocks in conjunction with other languages.
- remove `css` and `javascript` languages from being loaded in the main prism.js file.
- Add components directory with all additional `prism.js` supported languages.
  These are loaded on-demand by the `autoloader` plugin.
- Add small transition to the copy code element to match the language toolbar element.
  (100ms linear transition from 0 -> 100% opacity)
- Fix minor bug in FileWriter causing additional empty directories to be created
  when copying a folder with a trailing slash.
- Make the diff highlighting look better

Signed-off-by: solonovamax <[email protected]>

dokka-subprojects/plugin-base/src/main/kotlin/org/jetbrains/dokka/base/renderers/FileWriter.kt

@@ -80,7 +80,9 @@ public class FileWriter(
             if (Files.isDirectory(file)) {
                 val dirPath = file.toAbsolutePath().toString()
                 withContext(Dispatchers.IO) {
-                    Paths.get(root.path, rebase(dirPath)).toFile().mkdirsOrFail()
+                    // Append a slash to fix an issue with removePrefix in the rebase function
+                    // This causes useless directories to be created in some cases
+                    Paths.get(root.path, rebase("$dirPath/")).toFile().mkdirsOrFail()
                 }
             } else {
                 val filePath = file.toAbsolutePath().toString()

dokka-subprojects/plugin-base/src/main/kotlin/org/jetbrains/dokka/base/renderers/html/htmlPreprocessors.kt

@@ -70,10 +70,20 @@ public class ScriptsInstaller(private val dokkaContext: DokkaContext) : PageTran
         "scripts/symbol-parameters-wrapper_deferred.js",
     )
 
+    /**
+     * This directory is copied to the output, but is not included in the page
+     * header.
+     */
+    private val copiedScriptDirectories = listOf(
+        "scripts/components/"
+    )
+
     override fun invoke(input: RootPageNode): RootPageNode =
         input.let { root ->
-            if (dokkaContext.configuration.delayTemplateSubstitution) root
-            else root.modified(children = input.children + scriptsPages.toRenderSpecificResourcePage())
+            if (dokkaContext.configuration.delayTemplateSubstitution)
+                root
+            else
+                root.modified(children = input.children + (scriptsPages + copiedScriptDirectories).toRenderSpecificResourcePage())
         }.transformContentPagesTree {
             it.modified(
                 embeddedResources = it.embeddedResources + scriptsPages