Add cordova and rn export paths to auth

[hsubox76]

Seems like it needs the exact file path in "exports". See the firebase/messaging/sw path for the same pattern:

firebase-js-sdk/packages/messaging/package.json

Line 19 in c5d8f65

"./sw": {

That one is split into 3 because it has a Node version.

Fixes #5878

[changeset-bot]

⚠️ No Changeset found

Latest commit: bd37cb6

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[google-oss-bot]

Size Report ¹

Affected Products

• firebase

  Type	Base (c5d8f65)	Merge (b2023df)	Diff
  firebase-auth-cordova.js	91 B	462 kB	+462 kB (+508048.4%)
  firebase-auth-react-native.js	101 B	484 kB	+484 kB (+479364.4%)

Test Logs

• Base (c5d8f65): https://github.com/firebase/firebase-js-sdk/actions/runs/1720200731
• Merge (b2023df): https://github.com/firebase/firebase-js-sdk/actions/runs/1721092631

1. https://storage.googleapis.com/firebase-sdk-metric-reports/xvK0zcSVBI.html

[google-oss-bot]

Size Analysis Report ¹

Affected Products

No changes between base commit (c5d8f65) and merge commit (b2023df).

Test Logs

• Base (c5d8f65): https://github.com/firebase/firebase-js-sdk/actions/runs/1720200731
• Merge (b2023df): https://github.com/firebase/firebase-js-sdk/actions/runs/1721092631

1. https://storage.googleapis.com/firebase-sdk-metric-reports/LUTdaRrVAl.html