add back README old

Author: ChihChengLiang

README-old.md

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+# Circuits for zkEVM
+
+[![CI checks](https://github.com/privacy-scaling-explorations/zkevm-circuits/actions/workflows/ci.yml/badge.svg)](https://github.com/privacy-scaling-explorations/zkevm-circuits/actions/workflows/ci.yml)
+
+Check out the work in progress [specification](https://github.com/privacy-scaling-explorations/zkevm-specs) to learn how it works.
+
+
+## Getting started
+
+To run the same tests as the CI, please use: `make test-all`.
+
+## Running benchmarks
+
+There are currently several benchmarks to run in the workspace in regards to the circuits.
+All use the `DEGREE` env var to specify the degree of the `K` parameter that you want
+to use for your circuit in the bench process.
+-   Keccak Circuit prover benches. -> `DEGREE=16 make packed_multi_keccak_bench`
+-   EVM Circuit prover benches. -> `DEGREE=18 make evm_bench`.
+-   State Circuit prover benches. -> `DEGREE=18 make state_bench`
+-   MPT Circuit prover benches. -> `DEGREE=15 make mpt_bench`
+
+You can also run all benchmarks by running: `make circuit_benches DEGREE=18`.
+
+## GH Actions Benchmark Results
+
+Circuit Benchmark Results are accessible here: https://grafana.zkevm-testnet.org/d/vofy8DAVz/circuit-benchmarks?orgId=1
+
+- circuit_benchmarks panel displays:
+    - overall test result
+    - timers and system statistics
+    - url for downloading prover log and sys stat files
+    - clickable sysstats_url element that loads the memory and cpu utilization profiles for the given test