Convert Bloganuary screen to Material3

[nbradbury]

This small PR updates the Bloganuary screen to Material3. To make it easy to test, I changed the "My Site" fragment to automatically show the Bloganuary screen when it's created. I'll remove this before merging.

BEFORE

AFTER

[dangermattic]

	1 Warning
:warning:	PR is not assigned to a milestone.

Generated by :no_entry_sign: Danger

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack by scanning the QR code below to install the corresponding build.

	App Name	Jetpack
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr21342-ba2be02
	Commit	ba2be02e604e2b093a8c319a64853afdfd5df0c8
	Direct Download	jetpack-prototype-build-pr21342-ba2be02.apk

Note: Google Login is not supported on these builds.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress by scanning the QR code below to install the corresponding build.

	App Name	WordPress
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr21342-ba2be02
	Commit	ba2be02e604e2b093a8c319a64853afdfd5df0c8
	Direct Download	wordpress-prototype-build-pr21342-ba2be02.apk

Note: Google Login is not supported on these builds.

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 18 lines in your changes missing coverage. Please review.

Project coverage is 39.31%. Comparing base (ccb4c3c) to head (ba2be02). Report is 15 commits behind head on trunk.

Files with missing lines	Patch %	Lines
...nuary/learnmore/BloganuaryNudgeLearnMoreOverlay.kt	0.00%	18 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## trunk #21342 +/- ## ========================================== - Coverage 39.31% 39.31% -0.01% ========================================== Files 2121 2121 Lines 98292 98293 +1 Branches 15225 15226 +1 ========================================== Hits 38644 38644 - Misses 56213 56214 +1 Partials 3435 3435 ```

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