feat: add system type map as constant to schematics

npm/ng-packs/packages/schematics/src/constants/index.ts

@@ -1 +1,2 @@
 export * from './api';
+export * from './system-types';

npm/ng-packs/packages/schematics/src/constants/system-types.ts

@@ -0,0 +1,22 @@
+export const SYSTEM_TYPES = new Map([
+  ['Bool', 'boolean'],
+  ['Byte', 'number'],
+  ['Char', 'string'],
+  ['DateTime', 'string'],
+  ['DateTimeOffset', 'string'],
+  ['Decimal', 'number'],
+  ['Double', 'number'],
+  ['Guid', 'string'],
+  ['Int16', 'number'],
+  ['Int32', 'number'],
+  ['Int64', 'number'],
+  ['Object', 'object'],
+  ['Sbyte', 'number'],
+  ['Single', 'number'],
+  ['String', 'string'],
+  ['TimeSpan', 'string'],
+  ['UInt16', 'number'],
+  ['UInt32', 'number'],
+  ['UInt64', 'number'],
+  ['Void', 'void'],
+]);