Prepare for public preview release (#8214)

Author: hsubox76

.changeset/olive-points-fold.md

@@ -0,0 +1,7 @@
+---
+'firebase': minor
+'@firebase/vertexai-preview': patch
+'@firebase/app': patch
+---
+
+Add the preview version of the VertexAI SDK.

.github/workflows/prerelease-manual-deploy.yml

@@ -77,6 +77,7 @@ jobs:
             NPM_TOKEN_TESTING: ${{secrets.NPM_TOKEN_TESTING}}
             NPM_TOKEN_UTIL: ${{secrets.NPM_TOKEN_UTIL}}
             NPM_TOKEN_VERTEXAI: ${{secrets.NPM_TOKEN_VERTEXAI}}
+            NPM_TOKEN_VERTEXAI_PREVIEW: ${{secrets.NPM_TOKEN_VERTEXAI_PREVIEW}}
             NPM_TOKEN_WEBCHANNEL_WRAPPER: ${{secrets.NPM_TOKEN_WEBCHANNEL_WRAPPER}}
             NPM_TOKEN_FIREBASE: ${{secrets.NPM_TOKEN_FIREBASE}}
             NPM_TOKEN_APP_COMPAT: ${{ secrets.NPM_TOKEN_APP_COMPAT }}

.github/workflows/release-prod.yml

@@ -87,6 +87,7 @@ jobs:
         NPM_TOKEN_TESTING: ${{secrets.NPM_TOKEN_TESTING}}
         NPM_TOKEN_UTIL: ${{secrets.NPM_TOKEN_UTIL}}
         NPM_TOKEN_VERTEXAI: ${{secrets.NPM_TOKEN_VERTEXAI}}
+        NPM_TOKEN_VERTEXAI_PREVIEW: ${{secrets.NPM_TOKEN_VERTEXAI_PREVIEW}}
         NPM_TOKEN_WEBCHANNEL_WRAPPER: ${{secrets.NPM_TOKEN_WEBCHANNEL_WRAPPER}}
         NPM_TOKEN_FIREBASE: ${{secrets.NPM_TOKEN_FIREBASE}}
         NPM_TOKEN_APP_COMPAT: ${{ secrets.NPM_TOKEN_APP_COMPAT }}

.github/workflows/release-staging.yml

@@ -113,6 +113,7 @@ jobs:
         NPM_TOKEN_TESTING: ${{secrets.NPM_TOKEN_TESTING}}
         NPM_TOKEN_UTIL: ${{secrets.NPM_TOKEN_UTIL}}
         NPM_TOKEN_VERTEXAI: ${{secrets.NPM_TOKEN_VERTEXAI}}
+        NPM_TOKEN_VERTEXAI_PREVIEW: ${{secrets.NPM_TOKEN_VERTEXAI_PREVIEW}}
         NPM_TOKEN_WEBCHANNEL_WRAPPER: ${{secrets.NPM_TOKEN_WEBCHANNEL_WRAPPER}}
         NPM_TOKEN_FIREBASE: ${{secrets.NPM_TOKEN_FIREBASE}}
         NPM_TOKEN_APP_COMPAT: ${{ secrets.NPM_TOKEN_APP_COMPAT }}