feat: Add news notifications

[benfurber]

What kind of change does this PR introduce?

• 🐛 Bugfix — fixes incorrect behavior without changing functionality
• ✨ Feature — adds new functionality
• ♻️ Refactoring — improves code structure with no functional changes
• ⚡️ Performance — improves speed, memory, or efficiency
• 🧪 Tests — adds or updates tests only
• 🔧 Tools / CI — changes to build, deploy, or developer tooling
• 📝 Documentation — updates docs, comments, or READMEs
• 📦 Dependencies — upgrades, downgrades, or removes packages
• 🔖 Other:

What is the new behavior?

1. Adds in app notification display

2. Adds the ability to set the email visibility of news for badgers

3. Can change news email notifications

4. Adds the ability for news content creators to preview how a news article will look like in an email.

Turns out the email components package we're using gives us all of this styling for free:

Does this PR introduce a DB Schema Change or Migration?

• Yes

Git Issues

Closes #4674

[cypress]

onearmy-community-platform    Run #9330

Run Properties:   Failed #9330  •  ad7f7820ff: Merge branch 'master' into notifications/add-email-preview

Project	onearmy-community-platform
Branch Review	notifications/add-email-preview
Run status	Failed #9330
Run duration	13m 05s
Commit	ad7f7820ff: Merge branch 'master' into notifications/add-email-preview
Committer	Mário Nunes
View all properties for this run ↗︎

---

Test results
Failures	8
Flaky	1
Pending	0
Skipped	0
Passing	83
View all changes introduced in this branch ↗︎

---

Tests for review

  research/write.spec.ts • 2 failed tests • ci-chrome

View Output Video

Test		Artifacts
[Research] > [Create research article] > [By Authenticated]		Test Replay Screenshots Video
[Research] > [Displays draft updates for Author] > [By Authenticated]		Test Replay Screenshots Video

  questions/discussions.spec.ts • 1 failed test • ci-chrome

View Output Video

Test		Artifacts
[Questions.Discussions] > allows authenticated users to contribute to discussions		Test Replay Screenshots Video

  news/write.spec.ts • 2 failed tests • ci-chrome

View Output Video

Test		Artifacts
[News.Write] > Create and update		Test Replay Screenshots Video
[News.Write] > Create only for badgers		Test Replay Screenshots Video

  library/discussions.spec.ts • 1 failed test • ci-chrome

View Output Video

Test		Artifacts
[Library.Discussions] > allows authenticated users to contribute to discussions		Test Replay Screenshots Video

  news/discussions.spec.ts • 1 failed test • ci-chrome

View Output Video

Test		Artifacts
[News.Discussions] > allows authenticated users to contribute to discussions		Test Replay Screenshots Video

The first 5 failed specs are shown, see all 6 specs in Cypress Cloud.

  src/integration/research/discussions.spec.ts • 1 flaky test • ci-chrome

View Output Video

Test		Artifacts
[Research.Discussions] > allows authenticated users to contribute to discussions		Test Replay Screenshots Video