Update version to 3.0.0-prerelease-1

Co-authored-by: petrinecp <5637849+petrinecp@users.noreply.github.com>

Author: Copilot

Directory.Build.props

@@ -5,8 +5,8 @@
     <Authors>$(Company)</Authors>
     <Copyright>Copyright © $(Company) $([System.DateTime]::Now.Year)</Copyright>
     <Trademark>$(Company)™</Trademark>
-    <VersionPrefix>2.1.0</VersionPrefix>
-    <VersionSuffix></VersionSuffix>
+    <VersionPrefix>3.0.0</VersionPrefix>
+    <VersionSuffix>prerelease-1</VersionSuffix>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
 
     <PackageProjectUrl>https://github.com/Kentico/xperience-by-kentico-ecommerce</PackageProjectUrl>