Add script to fetch benchmark results for execuTorch

.ci/scripts/benchmark_tooling/README.md

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+# Benchmark Tooling
+
+A library providing tools for benchmarking ExecutorchBenchmark data.
+
+## Read Benchmark Data
+`get_benchmark_analysis_data.py` fetches benchmark data from HUD Open API and processes it, grouping metrics by private and public devices.
+
+### Quick Start
+
+Install dependencies:
+```bash
+pip install -r requirements.txt
+```
+
+Run with default output (CLI):
+```bash
+python3 .ci/scripts/benchmark_tooling/get_benchmark_analysis_data.py --startTime "2025-06-11T00:00:00" --endTime "2025-06-17T18:00:00"
+```
+
+Additional options:
+- `--silent`: Hide processing logs, show only results
+- `--outputType df`: Display results in DataFrame format
+- `--outputType excel --outputDir "{YOUR_LOCAL_DIRECTORY}"`: Generate Excel file with multiple sheets (`res_private.xlsx` and `res_public.xlsx`)
+- `--outputType csv --outputDir "{YOUR_LOCAL_DIRECTORY}"`: Generate CSV files in folders (`private` and `public`)
+
+
+### Python API Usage
+
+To use the benchmark fetcher in your own scripts:
+
+```python
+import ExecutorchBenchmarkFetcher from benchmark_tooling.get_benchmark_analysis_data
+fetcher = ExecutorchBenchmarkFetcher()
+# Must call run first
+fetcher.run()
+private, public = fetcher.to_df()
+```
+
+## analyze_benchmark_stability.py
+`analyze_benchmark_stability.py` analyzes the stability of benchmark data, comparing the results of private and public devices.
+
+### Quick Start
+Install dependencies:
+```bash
+pip install -r requirements.txt
+```
+
+```
+python .ci/scripts/benchmark_tooling/analyze_benchmark_stability.py \
+    Benchmark\ Dataset\ with\ Private\ AWS\ Devices.xlsx \
+    --reference_file Benchmark\ Dataset\ with\ Public\ AWS\ Devices.xlsx
+```