Reordering sections by relative ease, add Troubleshooting section

People are generally going to be clicking  in and asking how to do the easy / popular stuff (e.g. audio, then textures, then maybe models) so I've listed it as such.

As well, added "troubleshooting" section to decrease the amount of reliance on live Discord help *significantly.*

src/SUMMARY.md

@@ -17,13 +17,12 @@
 
 # Creating your mod
 
-- [Mesh/Model](modding-mesh/mesh-intro.md)
-  - [Extracting game models](modding-mesh/mesh-extracting.md)
-  - [Importing models into Blender]()
-  - [Setting up tangent-based outlines](modding-mesh/mesh-tangents.md)
-  - [Exporting models into UE4]()
-  - [Setting materials and outline]()
-  - [Custom materials]()
+- [Troubleshooting](troubleshooting/main.md)
+  - [Texture issues](troubleshooting/textures.md)
+
+- [Audio](modding-audio/audio-intro.md)
+  - [Extracting audio]()
+  - [Importing audio]()
 
 - [Texture/Colors](modding-texture/texture-intro.md)
   - [Extracting textures]()
@@ -33,9 +32,18 @@
   - [Editing SSS]()
   - [Editing detail/decal]()
   - [Exporting textures into UE4]()
+  - [Custom materials]()
   - [Per-game texture specifics]()
     - [Strive]()
     - [DBFZ]()
+
+- [Mesh/Model](modding-mesh/mesh-intro.md)
+  - [Extracting game models](modding-mesh/mesh-extracting.md)
+  - [Importing models into Blender]()
+  - [Setting up tangent-based outlines](modding-mesh/mesh-tangents.md)
+  - [Exporting models into UE4]()
+  - [Setting materials and outline]()
+  - [Custom materials](modding-texture/)
 
 - [Animations](modding-animation/animation-intro.md)
   - [Extracting animations]()
@@ -65,10 +73,6 @@
     - [Strive](modding-bbs/bbs-strive.md)
     - [DBFZ](modding-bbs/bbs-dbfz.md)
 
-- [Audio](modding-audio/audio-intro.md)
-  - [Extracting audio]()
-  - [Importing audio]()
-
 - [UI Modding](modding-ui/ui-intro.md)
   - [UMG basics](modding-ui/umg.md)
   - [Finding widgets](modding-ui/assets.md)