Add CodSpeed continuous performance testing

Author: codspeed-hq[bot]

.github/workflows/codspeed.yml

@@ -0,0 +1,50 @@
+name: CodSpeed
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    paths:
+      - .cargo/config.toml
+      - .github/workflows/codspeed.yml
+      - crates/**
+      - legacy/**
+      - Cargo.lock
+      - Cargo.toml
+      - rust-toolchain.toml
+  # `workflow_dispatch` allows CodSpeed to trigger backtest
+  # performance analysis in order to generate initial data.
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+  id-token: write
+
+env:
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+jobs:
+  codspeed:
+    name: Benchmarks
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: moonrepo/setup-rust@v1
+        with:
+          bins: cargo-codspeed
+          cache: false
+
+      - name: Build the benchmark targets
+        run: cargo codspeed build -p moon_affected -p moon_workspace
+
+      - name: Run the benchmarks
+        uses: CodSpeedHQ/action@v4
+        with:
+          mode: simulation
+          run: cargo codspeed run