Add benchmark workflow and update benchmarking code

[soundaranbu]

Introduces a new GitHub Actions workflow benchmark-on-pr for running benchmarks on pull requests. The workflow sets up .NET 8, checks out the code, and commits benchmark results. Updates in Program.cs include new using directives for BenchmarkDotNet analyzers and configurations. The benchmark report format is modified, showing a slight increase in execution time for the RenderViewWithModelAsync method.