feat(wasm-mps): add --target web build for browser-safe WASM init

Add dist/web/js/wasm Makefile target using wasm-pack --target web,
which generates a single ESM file with an explicit async init()
default export. This avoids the webpack asyncWebAssembly race where
__wbg_set_wasm may not be called before exports are used.

Update package.json to include dist/web/js/**/* in published files,
expose the ./web subpath export pointing to the generated entry
point, and add make dist/web/js/wasm to the build:wasm script.

Ticket: WCI-250

Author: Marzooqa

packages/wasm-mps/Makefile

@@ -64,6 +64,10 @@ dist/esm/js/wasm:
 dist/cjs/js/wasm:
 	$(call BUILD,$@,nodejs)
 
+.PHONY: dist/web/js/wasm
+dist/web/js/wasm:
+	$(call BUILD,$@,web)
+
 .PHONY: lint
 lint:
 	cargo fmt --check

packages/wasm-mps/package.json

@@ -11,6 +11,7 @@
   "files": [
     "dist/esm/js/**/*",
     "dist/cjs/js/**/*",
+    "dist/web/js/**/*",
     "dist/cjs/package.json"
   ],
   "exports": {
@@ -23,7 +24,8 @@
         "types": "./dist/cjs/js/index.d.ts",
         "default": "./dist/cjs/js/index.js"
       }
-    }
+    },
+    "./web": "./dist/web/js/wasm/wasm_mps.js"
   },
   "main": "./dist/cjs/js/index.js",
   "module": "./dist/esm/js/index.js",
@@ -35,7 +37,7 @@
   "scripts": {
     "test": "npm run test:mocha",
     "test:mocha": "mocha --recursive test",
-    "build:wasm": "make js/wasm && make dist/esm/js/wasm && make dist/cjs/js/wasm",
+    "build:wasm": "make js/wasm && make dist/esm/js/wasm && make dist/cjs/js/wasm && make dist/web/js/wasm",
     "build:ts-esm": "tsc",
     "build:ts-cjs": "tsc --project tsconfig.cjs.json",
     "build:ts": "npm run build:ts-esm && npm run build:ts-cjs",