.Net: Add Meter to Kernel

[GalRabin]

Motivation and Context

This pull request addresses the need for metrics support in the Semantic Kernel library.

1. Why is this change required? - Metrics are essential for monitoring the performance and overall health of applications. They provide insights to understand system behavior in production, and they allow us to identify and troubleshoot issues before they impact users. However, the Semantic Kernel library currently lacks built-in metrics support.

2. What problem does it solve? - This PR adds metrics support to the Semantic Kernel library, allowing users to monitor the library's performance and usage in their applications.

3. What scenario does it contribute to? - This feature will be particularly useful in scenarios where users need to analyze the usage and performance of the Semantic Kernel library in their applications. This could include tracking how often certain features are used, how long operations take, or how often errors occur.

4. Linked Issue - Related to issue Feature Request: Add Metrics Support via .NET's Built-In Meter to Semantic Kernel Library #1966 .

Description

This PR adds support for the .NET System.Diagnostics.Metrics.Meter API in the Semantic Kernel library. A new withMeter(Meter meter) method has been added to the Builder class, allowing users to pass in a custom Meter instance when configuring the Semantic Kernel library.

In the Semantic Kernel library code, this Meter is used to create and update metrics. Currently, a simple counter named "my-counter" is created as an example. Users can use a MeterListener to listen to these metrics and export them to their desired backend.

The overall design follows the common pattern of passing a Meter to the components that need to record metrics, allowing these components to remain decoupled from the specifics of metric collection and export.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows SK Contribution Guidelines (https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
• The code follows the .NET coding conventions (https://learn.microsoft.com/dotnet/csharp/fundamentals/coding-style/coding-conventions) verified with dotnet format
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[dmytrostruk]

Hi @GalRabin !
Metering is already implemented in previous PR, please take a look by following link: #1905.