[web] Added docs subsections.

web/content/docs/_index.pandoc

@@ -3,13 +3,13 @@ title = "Documentation"
 
 [[sections]]
 name = "User Guide"
-url = "/docs/userguide"
+url = "/docs/userguide/basics/introduction/"
 text = "Download, install and run an OGS benchmark in 5 minutes! No development setup required."
 icon = "fal fa-users"
 
 [[sections]]
 name = "Developer Guide"
-url = "/docs/devguide"
+url = "/docs/devguide/getting-started/introduction/"
 text = "You want to contribute to the OpenGeoSys project or implement a custom feature? In the Developer Guide you will find everything to get you started into OpenGeoSys development. Experienced developers will find a comprehensive list of advanced development topics."
 icon = "fal fa-laptop-code"
 
@@ -21,7 +21,7 @@ icon = "fal fa-rabbit-fast"
 
 [[sections]]
 name = "Tools & Workflows"
-url = "/docs/tools"
+url = "/docs/tools/getting-started/overview/"
 text = "Helpful tools for pre- and postprocessing as well as complete model setup workflows."
 icon = "fal fa-tools"
 

web/content/docs/benchmarks/elliptic/elliptic-dirichlet-volumetric-source-term.pandoc

@@ -5,8 +5,6 @@ project = "Elliptic/square_1x1_GroundWaterFlow/square_1e2_volumetricsourceterm.p
 author = "Tom Fischer"
 weight = 102
 
-aliases = [ "/docs/benchmarks/" ] # First benchmark page
-
 [menu]
   [menu.benchmarks]
     parent = "elliptic"

web/content/docs/benchmarks/elliptic/elliptic-dirichlet.pandoc

@@ -5,8 +5,6 @@ project = "Elliptic/square_1x1_GroundWaterFlow/square_1e2.prj"
 author = "Dmitri Naumov"
 weight = 102
 
-aliases = [ "/docs/benchmarks/" ] # First benchmark page
-
 [menu]
   [menu.benchmarks]
     parent = "elliptic"

web/content/docs/benchmarks/elliptic/poisson_equation.pandoc

@@ -5,8 +5,6 @@ project = "Elliptic/square_1x1_GroundWaterFlow_Python/square_1e3_poisson_sin_x_s
 author = "Tom Fischer"
 weight = 102
 
-aliases = [ "/docs/benchmarks/" ] # First benchmark page
-
 [menu]
   [menu.benchmarks]
     parent = "elliptic"

web/content/docs/devguide/_index.md

++++
+title = "Developer Guide"
++++

web/content/docs/devguide/getting-started/introduction.pandoc

@@ -4,8 +4,6 @@ title = "Welcome!"
 author = "Lars Bilke"
 weight = 1001
 
-aliases = [ "/docs/devguide/" ] # First devguide page
-
 [menu]
   [menu.devguide]
     parent = "getting-started"

web/content/docs/tools/_index.md

++++
+title = "Tools"
++++

web/content/docs/tools/getting-started/overview.pandoc

@@ -4,8 +4,6 @@ title = "Introduction"
 author = "Lars Bilke"
 weight = 100
 
-aliases = [ "/docs/tools/" ]
-
 [menu]
   [menu.tools]
     parent = "getting-started"

web/content/docs/userguide/_index.md

++++
+title = "User Guide"
+first = "basics/introduction"
++++

web/layouts/section/docs.html

@@ -2,7 +2,16 @@
   <div class="container">
     <h1>OpenGeoSys Documentation</h1>
     {{ .Content }}
+
+    <!-- /docs/[subsection]/ -->
+    <h2>{{ .CurrentSection.Title }}</h2>
+    <ul>
+      {{ range .Pages }}
+        <li><a href="{{ .URL }}">{{ .Title }}</a></li>
+      {{ end }}
+    </ul>
     <div class="flex flex-wrap">
+    <!-- /docs -->
     {{ range .Params.sections }}
       <div class="w-full sm:w-1/2 lg:w-1/3 p-3 my-3">
         <h2 class="mb-2 text-center text-base md:text-lg lg:text-xl xl:text-2xl">