Remove Hangfire integration sample project

Removed the entire Hangfire integration sample project, including all associated files and configurations. This cleanup ensures the solution is leaner and easier to maintain, focusing on core components.

Elsa.sln

@@ -383,10 +383,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Elsa.Tenants.AspNetCore", "
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Elsa.Agents.Persistence.EntityFrameworkCore.PostgreSql", "src\modules\Elsa.Agents.Persistence.EntityFrameworkCore.PostgreSql\Elsa.Agents.Persistence.EntityFrameworkCore.PostgreSql.csproj", "{2B939AC9-03A4-479E-AA0D-CB58F4A7F480}"
 EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "samples", "samples", "{0350351C-E347-41D8-8E9C-ECF90653418B}"
-EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Elsa.Samples.AspNet.HangfireIntegration", "samples\Elsa.Samples.AspNet.HangfireIntegration\Elsa.Samples.AspNet.HangfireIntegration.csproj", "{FAE7B132-8AD3-44C0-B45B-1B2BA64B1DB4}"
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -819,10 +815,6 @@ Global
 		{2B939AC9-03A4-479E-AA0D-CB58F4A7F480}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{2B939AC9-03A4-479E-AA0D-CB58F4A7F480}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{2B939AC9-03A4-479E-AA0D-CB58F4A7F480}.Release|Any CPU.Build.0 = Release|Any CPU
-		{FAE7B132-8AD3-44C0-B45B-1B2BA64B1DB4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{FAE7B132-8AD3-44C0-B45B-1B2BA64B1DB4}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{FAE7B132-8AD3-44C0-B45B-1B2BA64B1DB4}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{FAE7B132-8AD3-44C0-B45B-1B2BA64B1DB4}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -967,7 +959,6 @@ Global
 		{D5720DBC-8C2B-42D5-9D9F-2FF6EAD4001C} = {2F3E1026-5054-4E1F-899B-F1A7F70F9912}
 		{2B939AC9-03A4-479E-AA0D-CB58F4A7F480} = {50470834-4CD8-479A-8B58-0A1869BA5D37}
 		{2CDF3E1C-267D-4198-B1C7-7E1F548FC120} = {5BA4A8FA-F7F4-45B3-AEC8-8886D35AAC79}
-		{FAE7B132-8AD3-44C0-B45B-1B2BA64B1DB4} = {0350351C-E347-41D8-8E9C-ECF90653418B}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {D4B5CEAA-7D70-4FCB-A68E-B03FBE5E0E5E}