Bump version to 6.0.0-prerelease-1

[Copilot]

Major version bump from 5.2.0 to 6.0.0-prerelease-1 to align with Xperience by Kentico 31.0.0 release.

Changes

• Directory.Build.props: Updated VersionPrefix to 6.0.0 and VersionSuffix to prerelease-1

NuGet packages will publish as:

• Kentico.Xperience.Shopify 6.0.0-prerelease-1
• Kentico.Xperience.Shopify.Rcl 6.0.0-prerelease-1

Original prompt

Perform a version bump to the next major version in the repository. Set the to "prerelease-1" in all appropriate project or configuration files (such as .csproj, .nuspec, etc.). Do not update the README file at this time. Make sure all relevant version numbers reflect the new major version, incrementing from the current major version. Do not update files unrelated to the version change.

This pull request was created from Copilot chat.

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[petrinecp]

@copilot Also adjust VersionSuffix to <VersionSuffix>prerelease-1</VersionSuffix> and revert changes in README for now

[Copilot]

@copilot Also adjust VersionSuffix to <VersionSuffix>prerelease-1</VersionSuffix> and revert changes in README for now

Done in commit 8615156. The version is now set to 6.0.0-prerelease-1 and README changes have been reverted.

[Copilot]

Pull request overview

This PR bumps the version from 5.2.0 to 6.0.0-prerelease-1 to align with the Xperience by Kentico 31.0.0 release. The change is straightforward and updates the centralized version configuration.

• Updated VersionPrefix from 5.2.0 to 6.0.0 (major version bump)
• Set VersionSuffix to prerelease-1 (previously empty)

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