Added a ${GemName}.Builders variant to Asset-Only Gems (#1324)

* Creating Builder variant aliases for all Asset Gems

* Added an AssetGem template for creating an Asset Gem

The AssetGem template is meant for non-code Gems

* Updated the engine_template.py commands to use pathlib

Each of the four commands: create-template, create-from-template,
create-project and create-gem have been updated to use pathlib.Path or
any path manipulation

Fix several python errors when instantiating a template with missing
o3de objects.
For example attempting to use the create-project command with the
"DefaultGem" template would result in a python exception instaed of a
error log and a return value 0..

Added a **force** option to the engine_template commands
to force overriding of existing files

* Optimized search through text files when the create-template command is
run when attempting to replace the license text section

* Adding a Minimal Project Template that contains the minimal set of gems
as stated by UX

* Minor changes to the DefaultProject template. Added a license section to the EngineFinder.cmake

* Adding the MinimalProject to the engine.json file

Templates/DefaultProject/template.json

@@ -25,12 +25,6 @@
             "isTemplated": true,
             "isOptional": false
         },
-        {
-            "file": "EngineFinder.cmake",
-            "origin": "EngineFinder.cmake",
-            "isTemplated": false,
-            "isOptional": false
-        },
         {
             "file": "Code/${NameLower}_files.cmake",
             "origin": "Code/${NameLower}_files.cmake",
@@ -49,12 +43,6 @@
             "isTemplated": true,
             "isOptional": false
         },
-        {
-            "file": "Code/gem.json",
-            "origin": "Code/gem.json",
-            "isTemplated": true,
-            "isOptional": true
-        },
         {
             "file": "Code/Include/${Name}/${Name}Bus.h",
             "origin": "Code/Include/${Name}/${Name}Bus.h",
@@ -175,12 +163,24 @@
             "isTemplated": true,
             "isOptional": false
         },
+        {
+            "file": "Code/gem.json",
+            "origin": "Code/gem.json",
+            "isTemplated": true,
+            "isOptional": true
+        },
         {
             "file": "Config/shader_global_build_options.json",
             "origin": "Config/shader_global_build_options.json",
             "isTemplated": false,
             "isOptional": false
         },
+        {
+            "file": "EngineFinder.cmake",
+            "origin": "EngineFinder.cmake",
+            "isTemplated": false,
+            "isOptional": false
+        },
         {
             "file": "Platform/Android/android_project.cmake",
             "origin": "Platform/Android/android_project.cmake",
@@ -478,7 +478,7 @@
         {
             "file": "ShaderLib/README.md",
             "origin": "ShaderLib/README.md",
-            "isTemplated": true,
+            "isTemplated": false,
             "isOptional": true
         },
         {
@@ -514,7 +514,7 @@
         {
             "file": "game.cfg",
             "origin": "game.cfg",
-            "isTemplated": true,
+            "isTemplated": false,
             "isOptional": false
         },
         {
@@ -650,6 +650,10 @@
         {
             "dir": "Shaders",
             "origin": "Shaders"
+        },
+        {
+            "dir": "Shaders/ShaderResourceGroups",
+            "origin": "Shaders/ShaderResourceGroups"
         }
     ]
 }