add new page parameter GeekdocCollapseSection

exampleSite/content/collapse/_index.md

@@ -0,0 +1,5 @@
+---
+geekdocCollapseSection: true
+---
+
+Demo foldable menu entries

exampleSite/content/collapse/level-1/_index.md

@@ -0,0 +1,7 @@
+Level 1
+
+<!-- spellchecker-disable -->
+
+{{< toc-tree >}}
+
+<!-- spellchecker-enable -->

exampleSite/content/collapse/level-1/level-1-1.md

@@ -0,0 +1,5 @@
+---
+title: Level 1.1
+---
+
+Level 1.1

exampleSite/content/collapse/level-1/level-1-2.md

@@ -0,0 +1,5 @@
+---
+title: Level 1.2
+---
+
+Level 1.2

exampleSite/content/collapse/level-2/_index.md

@@ -0,0 +1,5 @@
+---
+geekdocCollapseSection: true
+---
+
+Level-2

exampleSite/content/collapse/level-2/level-2-1.md

@@ -0,0 +1,5 @@
+---
+title: Level 2.1
+---
+
+Level 2.1

exampleSite/content/collapse/level-2/level-2-2.md

@@ -0,0 +1,5 @@
+---
+title: Level 2.2
+---
+
+Level 2.2

exampleSite/content/shortcodes/_index.md

@@ -0,0 +1,3 @@
+---
+weight: -10
+---

exampleSite/content/usage/_index.md

@@ -1,4 +1,3 @@
 ---
-title: Usage
-weight: -10
+weight: -20
 ---

exampleSite/content/usage/configuration.md

@@ -207,6 +207,9 @@ geekdocHidden = true
 # NOTE: Only applies when 'geekdocHidden = true'.
 geekdocHiddenTocTree = true
 
+# Set to true to make a section foldable in side menu (file-tree menu only)
+geekdocCollapseSection = true
+
 # Add an anchor link to headlines
 geekdocAnchor = true
 ```
@@ -251,6 +254,9 @@ geekdocHidden: true
 # NOTE: Only applies when 'geekdocHidden: true'.
 geekdocHiddenTocTree: true
 
+# Set to true to make a section foldable in side menu (file-tree menu only)
+geekdocCollapseSection: true
+
 # Add an anchor link to headlines
 geekdocAnchor: true
 ```