Scaladoc: Repair links

Author: pikinier20

docs/_docs/index.md

@@ -1,5 +1,6 @@
 ---
 layout: doc-page
+redirectFrom: docs/index.html
 ---
 
 Dotty is the project name for technologies that are considered for inclusion in Scala 3. Scala has

docs/sidebar.yml

@@ -1,6 +1,7 @@
 index: index.md
 subsection:
   - title: Usage
+    directory: docs/usage
     subsection:
       - page: usage/sbt-projects.md
       - page: usage/ide-support.md
@@ -15,6 +16,7 @@ subsection:
           - page: usage/scaladoc/site-versioning.md
           - page: usage/scaladoc/static-site.md
   - title: Reference
+    directory: docs/reference
     subsection:
       - page: reference/overview.md
       - title: New Types
@@ -154,6 +156,7 @@ subsection:
       - page: reference/soft-modifier.md
       - page: reference/features-classification.md
   - title: Contributing
+    directory: docs/contributing
     subsection:
       - page: contributing/contribute-knowledge.md
       - page: contributing/getting-started.md
@@ -171,6 +174,7 @@ subsection:
           - page: contributing/procedures/release.md
           - page: contributing/procedures/vulpix.md
   - title: Internals
+    directory: docs/internals
     subsection:
       - page: internals/backend.md
       - page: internals/classpaths.md

scaladoc/src/dotty/tools/scaladoc/site/common.scala

@@ -18,7 +18,7 @@ import com.vladsch.flexmark.formatter.Formatter
 
 import scala.collection.JavaConverters._
 
-val docsRootDRI: DRI = DRI(location = "docs/index", symbolUUID = staticFileSymbolUUID)
+val docsRootDRI: DRI = DRI(location = "_docs/index", symbolUUID = staticFileSymbolUUID)
 val apiPageDRI: DRI = DRI(location = "api/index")
 
 def defaultMarkdownOptions(using ctx: StaticSiteContext): DataHolder =