fix(release): unblock npm publish — remove broken kit install, add payment ext (#101)

The Release NPM workflow ran `npm ci` in Kits/Rokt, which requires a
package-lock.json. The kits are dependency-less and carry no lock file, so
`npm ci` failed with EUSAGE and the 4.0.0 release published the plugin but
not the Rokt kit, and created no tag or GitHub release.

The kits have no dependencies and no lifecycle scripts, so `npm publish`
packs and uploads on its own — no install step is needed. Remove the Rokt
kit install step entirely (rather than swapping `npm ci` for `npm install`),
and add the missing RoktPaymentExtension publish step (new in 4.0.0, with
publishConfig, but never published because the workflow had no step for it).

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: jamesnrokt

.github/workflows/release-from-main.yml

@@ -52,14 +52,14 @@ jobs:
         working-directory: plugin
         run: npm publish --access public
 
-      - name: Install Rokt Kit dependencies
-        working-directory: Kits/Rokt
-        run: npm ci
-
       - name: Publish Rokt Kit to npm
         working-directory: Kits/Rokt
         run: npm publish --access public
 
+      - name: Publish Rokt Payment Extension to npm
+        working-directory: Kits/RoktPaymentExtension
+        run: npm publish --access public
+
       - uses: ffurrer2/extract-release-notes@273da39a24fb7db106a35526c8162815faffd31d # v3.1.0
         id: extract-release-notes
         with: