Add npmpackage recipe for Conan

Introduce a new npmpackage recipe to support C++ libraries using the npm generator. The recipe includes a conanfile and configuration to generate an npm-compatible `package.json` with sanitized versioning, ensuring seamless integration with npm workflows.

Contribute to NP-637

recipes/npmpackage/all/conanfile.py

@@ -0,0 +1,45 @@
+from conan import ConanFile
+from conan.tools.scm import Version
+
+from pathlib import Path
+
+required_conan_version = ">=2.7.0"
+
+
+def sanitize_version(version: Version):
+    if version.pre:
+        return str(version)
+    else:
+        # npm will otherwise 'sanitize' the version number
+        return str(version).replace("+", "_")
+
+
+def conf_package_json(conanfile: ConanFile, **kwargs):
+    entry_point = [p.name for p in Path(conanfile.package_folder, "bin").rglob("*.js")][0]
+    package_json = {
+        "name": f"@{conanfile.author.lower()}/{conanfile.name.lower()}js",
+        "version": f"{sanitize_version(Version(conanfile.version))}",
+        "description": f"JavaScript / TypeScript bindings for {conanfile.name}, a {conanfile.description}",
+        "main": f"bin/{entry_point}",
+        "repository": {
+            "type": "git",
+            "url": conanfile.url
+        },
+        "author": conanfile.author,
+        "license": conanfile.license,
+        "keywords": conanfile.topics,
+        "files": [
+            "bin",
+            "package.json"
+        ]
+    }
+    package_json |= kwargs
+    conanfile.output.info(f"Generated package.json: {package_json}")
+
+    conanfile.conf_info.define(f"user.{conanfile.name.lower()}:package_json", package_json)
+
+
+class PyReq(ConanFile):
+    name = "npmpackage"
+    description = "This is a base conan file description for C++ libraries/applications that use the npm generator"
+    package_type = "python-require"

recipes/npmpackage/config.yml

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+versions:
+  "1.0.0":
+    folder: "all"