First scaffold for the new collapsible navigation

Author: ryyppy

src/DocsOverview.js

@@ -39,6 +39,7 @@ let default = (~showVersionSelect=true) => {
     ("GenType", "/docs/gentype/latest/introduction"),
     ("Reanalyze", "https://github.com/reason-association/reanalyze"),
   ]
+
   let tools = [("Syntax Lookup", "/syntax-lookup")]
 
   let versionSelect = if showVersionSelect {
@@ -55,7 +56,7 @@ let default = (~showVersionSelect=true) => {
       router->Next.Router.push(targetUrl)
     }
     <div className="text-fire">
-      <VersionSelect availableVersions=ManualDocsLayout.allManualVersions onChange version />
+      <VersionSelect availableVersions=Constants.allManualVersions onChange version />
     </div>
   } else {
     React.null

src/DocsOverview.res

@@ -0,0 +1,21 @@
+// This is used for the version dropdown in the manual layouts
+let allManualVersions = [("latest", "v8.2.0"), ("v8.0.0", "< v8.2.0")]
+
+// Used for the DocsOverview and collapsible navigation
+let languageManual = version => {
+  [
+    ("Overview", `/docs/manual/${version}/introduction`),
+    ("Language Features", `/docs/manual/${version}/overview`),
+    ("JS Interop", `/docs/manual/${version}/embed-raw-javascript`),
+    ("Build System", `/docs/manual/${version}/build-overview`),
+  ]
+}
+
+let ecosystem = [
+  ("Package Index", "/packages"),
+  ("rescript-react", "/docs/react/latest/introduction"),
+  ("GenType", "/docs/gentype/latest/introduction"),
+  ("Reanalyze", "https://github.com/reason-association/reanalyze"),
+]
+
+let tools = [("Syntax Lookup", "/syntax-lookup")]