fix: root index page and redirects

Author: sgammon

Writerside/e.tree

@@ -4,10 +4,10 @@
 
 <instance-profile id="e"
                  name="Elide"
-                 start-page="Welcome.md"
+                 start-page="Index.md"
                  status="eap">
 
-    <toc-element topic="Welcome.md"/>
+    <toc-element topic="Index.md"/>
     <toc-element topic="Installation.md"/>
     <toc-element topic="GettingStarted.md"/>
     <toc-element topic="Language-Guides.topic">

Writerside/redirection-rules.xml

@@ -1,4 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE rules SYSTEM "https://resources.jetbrains.com/writerside/1.0/redirection-rules.dtd">
 <rules>
+    <rule id="430e26ef">
+        <description>Created after removal of "Welcome" from Elide</description>
+        <accepts>Welcome.html</accepts>
+    </rule>
 </rules>