Bump version to 1.12.0 for release

New since v1.11.2:
- Add unified Settings window (#351)
- Publish SSMS extension to the SSMS Gallery on release (#348)
- Restore dropped XML docs in AppSettingsService

Bumps Directory.Build.props, the SSMS .vsixmanifest, and AssemblyInfo.cs
(the three version sources documented in Directory.Build.props).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: erikdarlingdata

src/Directory.Build.props

@@ -15,7 +15,7 @@
     Tests and server/ projects are outside src/ and are unaffected.
   -->
   <PropertyGroup>
-    <Version>1.11.2</Version>
+    <Version>1.12.0</Version>
     <Authors>Erik Darling</Authors>
     <Company>Darling Data LLC</Company>
     <Product>Performance Studio</Product>

src/PlanViewer.Ssms/Properties/AssemblyInfo.cs

@@ -7,5 +7,5 @@
 [assembly: AssemblyProduct("Performance Studio for SSMS")]
 [assembly: AssemblyCopyright("Copyright Darling Data 2026")]
 [assembly: ComVisible(false)]
-[assembly: AssemblyVersion("1.11.2.0")]
-[assembly: AssemblyFileVersion("1.11.2.0")]
+[assembly: AssemblyVersion("1.12.0.0")]
+[assembly: AssemblyFileVersion("1.12.0.0")]

src/PlanViewer.Ssms/source.extension.vsixmanifest

@@ -3,7 +3,7 @@
                  xmlns:d="http://schemas.microsoft.com/developer/vsx-schema-design/2011">
   <Metadata>
     <Identity Id="PlanViewer.Ssms.64F79022-9D9A-4463-A1AE-4B19426A0CB1"
-              Version="1.11.2"
+              Version="1.12.0"
               Language="en-US"
               Publisher="Darling Data" />
     <DisplayName>Performance Studio for SSMS</DisplayName>