Integrate ReaderPostHeaderView

[kean]

This PR is part of CMM-1999: Reader: Adaptive Post Details Page. It integrates new ReaderPostHeaderView on the "Post Details" screen.

[sonarqubecloud]

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 SonarQube Cloud

[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
	Configuration	Release-Alpha
	Build Number	31844
	Version	PR #25465
	Bundle ID	org.wordpress.alpha
	Commit	a0c0c1a
	Installation URL	60e8bte89m2m0

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.

[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
	Configuration	Release-Alpha
	Build Number	31844
	Version	PR #25465
	Bundle ID	com.jetpack.alpha
	Commit	a0c0c1a
	Installation URL	4cm4di83tv1pg

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.