docs: add C# circuit breaker configuration examples

[Aryex]

Summary

Add C# code examples to the circuit breaker configuration page, replacing the "not yet available" placeholders.

⚠️ Attention: This PR was generated automatically. Verify that all relevant pages have been updated.

Source Commits

• 35943e8 — Add circuit breaker configuration support (#483)

Changes

• Replaced C# "not yet available" placeholder in the Configuration section with a complete code example showing CircuitBreakerConfig fluent builder, GlideClientConfiguration.WithCircuitBreaker(), and GlideClient.CreateClient()
• Replaced C# "not yet available" placeholder in the Handling Rejections section with a try/catch example using CircuitBreakerException

Context

C# #483 implements CircuitBreakerConfig with a fluent WithXxx() API, wires it through FFI to the Rust core, and surfaces CircuitBreakerException when the breaker is open. The C# client uses idiomatic TimeSpan for duration parameters rather than raw milliseconds. This completes circuit breaker support across all GLIDE language clients.

cc @currantw

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This PR was generated by the automated documentation pipeline.