rewrote impose to use new Operator class,

dependencies (pdfcpu) can be made environment-aware using tsconfig.json

shared-operations/tsconfig.json

@@ -0,0 +1,8 @@
+{
+    "compilerOptions": {
+        "baseUrl": "./src",                                  /* Specify the base directory to resolve non-relative module names. */
+        "paths": {
+            "#pdfcpu": ["../../shared-operations/src/wasm/pdfcpu/pdfcpu-wrapper.server"],
+        } 
+    }                                     /* Specify a set of entries that re-map imports to additional lookup locations. */ 
+}