Refactor NPM generator for CLI and development support

Improve the NPM generator to handle both CLI and development scenarios. Added conditional logic for CLI package deployments and development environment package generation. Simplified error handling and adjusted file-saving logic for better maintainability.

NP-637

extensions/generators/npm.py

@@ -1,8 +1,8 @@
+import os
 import json
 
 from conan import ConanFile
-from conan.errors import ConanException
-from conan.tools.files import copy, save
+from conan.tools.files import copy, mkdir, save
 from pathlib import Path
 
 
@@ -13,18 +13,27 @@ class npm:
     def generate(self):
         if self._conanfile.settings.os != "Emscripten":
             self._conanfile.output.error("Can only deploy to NPM when build for Emscripten")
-            raise ConanException("Can only deploy to NPM when build for Emscripten")
+            return
 
+        if self._conanfile.display_name == "cli":  # We're installing a CLI package from the conan local cache
             root_package = [dep for dep in self._conanfile.dependencies.direct_host.values()][0]
+            src_folder = root_package.package_folder
+            conf_info = root_package.conf_info
+            name = root_package.ref.name
 
             # Copy the *.js and *.d.ts
-        copy(self._conanfile, "*.js", src=root_package.package_folder, dst=self._conanfile.generators_folder)
-        copy(self._conanfile, "*.d.ts", src=root_package.package_folder, dst=self._conanfile.generators_folder)
+            copy(self._conanfile, "*.js", src=src_folder, dst=self._conanfile.generators_folder)
+            copy(self._conanfile, "*.d.ts", src=src_folder, dst=self._conanfile.generators_folder)
 
             # Create the package.json
             save(self._conanfile, str(Path(self._conanfile.generators_folder, "package.json")),
-             json.dumps(root_package.conf_info.get(f"user.{root_package.ref.name.lower()}:package_json")))
+                 json.dumps(conf_info.get(f"user.{name.lower()}:package_json")))
 
             # Create the .npmrc file
             save(self._conanfile, str(Path(self._conanfile.generators_folder, ".npmrc")),
                  "//npm.pkg.github.com/:_authToken=${GITHUB_TOKEN}\n@ultimaker:registry=https://npm.pkg.github.com\nalways-auth=true")
+        else:  # We're generating a package for a development environment
+            package_json = self._conanfile.python_requires["npmpackage"].module.generate_package_json(self._conanfile,
+                os.path.join(self._conanfile.cpp.build.bindirs[0], self._conanfile.cpp.build.bin[0]))
+        save(self._conanfile, str(Path(self._conanfile.build_folder, "package.json")),
+             json.dumps(package_json))