adjust template to `import type` instead of import only

packages/cli/src/templates/schema.ejs

@@ -1,4 +1,4 @@
-import { Schema } from "shexj";
+import type { Schema } from "shexj";
 
 /**
  * =============================================================================

packages/cli/src/templates/shapeTypes.compact.ejs

@@ -1,6 +1,6 @@
-import { CompactShapeType } from "@ldo/ldo";
+import type { CompactShapeType } from "@ldo/ldo";
 import { <%- fileName %>Schema } from "./<%- fileName %>.schema";
-    import {
+    import type {
     <% typings.forEach((typing)=> { if (!/Id$/.test(typing.dts.name)) { -%>
       <%- typing.dts.name %>,
         <% } }); -%>} from "./<%- fileName %>.typings";