Simplify JSON schema, generation, copying and updating (#13427)

* Simplify JSON schema and only generate appsettings-schema.Umbraco.Cms.json

* Use Umbraco.JsonSchema.Extensions to dynamically add JSON schema references

* Move DependentUpon items to shared MSBuild props

* Update LangVersion to latest

* Update Umbraco.GitVersioning.Extensions to 0.2.0

* Remove JSON schemas on clean

* Remove Umbraco.JsonSchema.Core project

* Fix JSON schema nullability

* Ignore additional JSON schema files in template

* Update CompatibilitySuppressions.xml

* Remove GlobalSettings.UmbracoPath from JSON schema again

* Remove RemoveUmbracoJsonSchemaFiles target

* Update Umbraco.JsonSchema.Extensions to 0.2.0 and add weights

* Flatten generated JSON schema hierarchy

* Remove LicensesSettings from CMS codebase

* Change AdditionalParameters to IDictionary

templates/UmbracoProject/.gitignore

@@ -459,8 +459,9 @@ $RECYCLE.BIN/
 ## Umbraco CMS
 ##
 
-# JSON schema file for appsettings.json
+# JSON schema files for appsettings.json
 appsettings-schema.json
+appsettings-schema.*.json
 
 # Packages created from the backoffice (package.xml/package.zip)
 /umbraco/Data/CreatedPackages/

templates/UmbracoProject/UmbracoProject.csproj

@@ -26,15 +26,6 @@
     <RazorCompileOnBuild>false</RazorCompileOnBuild>
     <RazorCompileOnPublish>false</RazorCompileOnPublish>
   </PropertyGroup>
-
-  <ItemGroup>
-    <Content Update="appsettings.*.json">
-      <DependentUpon>appsettings.json</DependentUpon>
-    </Content>
-    <Content Update="appsettings-schema.*.json">
-      <DependentUpon>appsettings-schema.json</DependentUpon>
-    </Content>
-  </ItemGroup>
   
   <Import Project="..\PACKAGE_PROJECT_NAME_FROM_TEMPLATE\build\PACKAGE_PROJECT_NAME_FROM_TEMPLATE.targets" Condition="'$(PackageProjectName)' != ''" />
   <ItemGroup Condition="'$(PackageProjectName)' != ''">

templates/UmbracoProject/appsettings.Development.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "./appsettings-schema.json",
+  "$schema": "appsettings-schema.json",
   "Serilog": {
     "MinimumLevel": {
       "Default": "Information"

templates/UmbracoProject/appsettings.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "./appsettings-schema.json",
+  "$schema": "appsettings-schema.json",
   "Serilog": {
     "MinimumLevel": {
       "Default": "Information",