fix(mosaic): resolve framework scripts via import.meta.url (#385)

Fixes #383 — resolveTool now uses fileURLToPath(import.meta.url). Adds package.json/framework subpath exports. Bumps @mosaic/mosaic to 0.0.18.

packages/mosaic/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mosaic/mosaic",
-  "version": "0.0.17",
+  "version": "0.0.18",
   "repository": {
     "type": "git",
     "url": "https://git.mosaicstack.dev/mosaic/mosaic-stack.git",
@@ -18,7 +18,9 @@
     ".": {
       "types": "./dist/index.d.ts",
       "default": "./dist/index.js"
-    }
+    },
+    "./package.json": "./package.json",
+    "./framework/*": "./framework/*"
   },
   "scripts": {
     "build": "tsc",