Set up clangd for intellisense. Whoof, that was difficult.

README.md

@@ -9,6 +9,8 @@ Install important Software
     - install git-lfs support.  Usually: apt-get install git-lfs
     - install visual studio code.  Usually: apt-get install code  
     - install dotnet6.  Usually: apt-get install dotnet6
+    - install clangd-15.  Usually: apt-get install clangd-15
+    - install jq.  On Linux, this is usually already installed.
     - install python3.  On Linux, this is usually already installed.
 
 Git Clone the UnrealEngine repository:  
@@ -25,11 +27,6 @@ Git Clone the integration Repository
 Apply patches and build everything:
     - Change directory to $HOME/integration
     - python3 build-everything.py
-    -
-    - Note: build-everything is mainly intended for the *initial* build.
-    - If you want to edit the code and recompile, it is okay to use
-    - build-everything.py a second time, but it's unnecessarily slow.
-    - It's much faster to edit and recompile using visual studio code.
 
 Launch Integration in the Debugger  
     - Change directory to $HOME/integration