ci: publish-internal-version-action-workflow (#378)

Author: Zaimwa9

.github/pull_request_template.md

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+Thanks for submitting a PR! Please check the boxes below:
+
+- [ ] I have read the [Contributing Guide](/Flagsmith/flagsmith/blob/main/CONTRIBUTING.md).
+- [ ] I have added information to `docs/` if required so people know about the feature.
+- [ ] I have filled in the "Changes" section below.
+- [ ] I have filled in the "How did you test this code" section below.
+
+## Changes
+
+Contributes to <!-- insert issue # or URL -->
+
+<!-- Change "Contributes to" to "Closes" if this PR, when merged, completely resolves the referenced issue.
+Leave "Contributes to" if the changes need to be released first. -->
+
+_Please describe._
+
+## How did you test this code?
+
+<!-- If the answer is manually, please include a quick step-by-step on how to test this PR. -->
+
+_Please describe._

.github/workflows/publish-internal.yml

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+name: Publish Internal NPM Package
+
+on:
+  workflow_dispatch:
+
+permissions:
+  id-token: write
+  contents: read
+
+jobs:
+  package:
+    runs-on: ubuntu-latest
+    name: Publish Internal NPM Package
+
+    steps:
+      - name: Cloning repo
+        uses: actions/checkout@v5
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: .nvmrc
+          registry-url: 'https://registry.npmjs.org'
+
+      - run: npm i
+
+      - name: Set internal version
+        run: |
+          VERSION=$(node -p "require('./lib/flagsmith/package.json').version")
+          INTERNAL="${VERSION}-internal.${{ github.run_number }}"
+          echo "Publishing version: $INTERNAL"
+          cd lib/flagsmith && npm version $INTERNAL --no-git-tag-version
+          cd ../../lib/react-native-flagsmith && npm version $INTERNAL --no-git-tag-version
+
+      - name: Build and test
+        run: npm run build && npm test
+
+      - name: Publish
+        run: |
+          cd lib/flagsmith && npm publish --tag internal --access public
+          cd ../../lib/react-native-flagsmith && npm publish --tag internal --access public