Add programmatic consent API to @probo/cookie-banner

Expose a ConsentManager singleton via `@probo/cookie-banner/consent`
(ESM) and `window.Probo.consent` (IIFE) so customers can check and
react to consent state in their bundled JavaScript code, solving the
problem of third-party SDKs initialized programmatically that cannot
be blocked via data-cookie-consent attributes.

Signed-off-by: Émile Ré <emile@getprobo.com>

packages/cookie-banner/package.json

@@ -16,6 +16,11 @@
       "types": "./dist/headless/index.d.ts",
       "import": "./dist/cookie-banner-headless.mjs",
       "default": "./dist/cookie-banner-headless.mjs"
+    },
+    "./consent": {
+      "types": "./dist/consent.d.ts",
+      "import": "./dist/cookie-banner-consent.mjs",
+      "default": "./dist/cookie-banner-consent.mjs"
     }
   },
   "scripts": {