Docs: Reduce footprint of development section in navbar (#5521)

docs/development/code-formatting.md

@@ -1,4 +1,4 @@
-# Code Formatting Conventions and Prettify Tool
+# Code Formatting
 
 Uniform formatting of CP2K source code is enabled by a
 [fprettify](https://github.com/fortran-lang/fprettify) that is an almost complete auto-formatter for

docs/development/code-structure.md

@@ -1,4 +1,4 @@
-# CP2K Code Structure
+# Code Structure
 
 CP2K is a large, complex application which has many features, methods and algorithms implemented.
 When looking at the code for the first time it can be very challenging to understand how it all

docs/development/regtesting.md

@@ -1,4 +1,4 @@
-# CP2K Regression Testing
+# Regression Testing
 
 CP2K comes with over 3000 test input files (located in \[[src>tests]\]) which serve as both examples
 on how to use the many features in CP2K and also as a method for developers to test modifications

docs/development/under-the-hood.md

@@ -0,0 +1,16 @@
+# Under the Hood
+
+```{toctree}
+---
+titlesonly:
+maxdepth: 2
+---
+code-structure
+code-formatting
+coding-conventions
+error-handling
+print-keys
+preprocessing
+regtesting
+dependencies
+```

docs/index.md

@@ -8,8 +8,6 @@ class: no-scaled-link
 ---
 ```
 
-% TODO: `{toctree} % :caption: Get started % % get-started/installation % get-started/tutorials % `
-
 ```{toctree}
 ---
 caption: Getting Started
@@ -23,23 +21,6 @@ getting-started/distributions
 getting-started/first-calculation
 ```
 
-```{toctree}
----
-caption: Development
-titlesonly:
-maxdepth: 1
----
-development/onboarding
-development/coding-conventions
-development/code-structure
-development/error-handling
-development/print-keys
-development/code-formatting
-development/regtesting
-development/preprocessing
-development/dependencies
-```
-
 ```{toctree}
 ---
 caption: Methods
@@ -69,8 +50,6 @@ technologies/accelerators/index
 technologies/libraries
 ```
 
-% TODO: `{toctree} % :caption: How-to guides % % dummy % `
-
 ```{toctree}
 ---
 caption: References
@@ -83,7 +62,15 @@ acronyms
 units
 ```
 
-% TODO: `{toctree} % :caption: Explanations % % dummy % `
+```{toctree}
+---
+caption: Development
+titlesonly:
+maxdepth: 1
+---
+development/onboarding
+development/under-the-hood
+```
 
 ```{toctree}
 ---