Description

This PR implements a comprehensive benchmark dashboard for NativeLink. The dashboard visualizes performance metrics including build times, cache hit ratios, memory usage, and network usage across different commits. It includes:

• A dashboard UI with summary metrics and trend charts
• Benchmark scripts to collect performance data
• Data aggregation tools
• GitHub Actions workflow for automated benchmarking

Fixes #1700

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Tested the dashboard with sample benchmark data
• Verified visualization of build times, cache hit ratios, and memory usage
• Tested the benchmark scripts with a sample C++ project
• Verified data aggregation functionality

Checklist

• Updated documentation if needed
• Tests added/amended
• bazel test //... passes locally
• /claim #1700

This change is