feat: Add propeller swap encoders

- Add setup for package
- Add docs
- Add balancer implementation and test
- Add CI:
  - Add setup action
  - Add test and format CI
- Add CD: Publish python package to AWS

.github/workflows/publish-swap-encoders-package.yaml

@@ -0,0 +1,29 @@
+name: Publish Propeller Swap Encoders Python Packages to AWS CodeArtifact
+
+on:
+  release:
+    types:
+      - prereleased
+      - released
+  workflow_dispatch: { }
+
+permissions:
+  id-token: write
+  contents: read
+
+jobs:
+  publish_propeller_solver_core:
+    uses: propeller-heads/ci-cd-templates/.github/workflows/release-python-package.yaml@main
+    permissions:
+      id-token: write
+      contents: read
+    with:
+      package_root: "propeller-solver-core"
+
+  publish_propeller_swap_encoders:
+    uses: propeller-heads/ci-cd-templates/.github/workflows/release-python-package.yaml@main
+    permissions:
+      id-token: write
+      contents: read
+    with:
+      package_root: "propeller-swap-encoders"

.github/workflows/python-tests.yaml

@@ -0,0 +1,32 @@
+name: Test code using pytest
+
+on:
+  workflow_call:
+    inputs:
+      runs_on:
+        required: false
+        type: string
+        default: ubuntu-latest
+      timeout_minutes:
+        required: false
+        type: number
+        default: 15
+
+jobs:
+  test-python:
+    runs-on: "${{ inputs.runs_on }}"
+    timeout-minutes: "${{ inputs.timeout_minutes }}"
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Env
+        uses: ./.github/actions/setup_env
+
+      - name: Test with pytest
+        id: tests
+        run: |
+            export PYTHONPATH=$PYTHONPATH:$GITHUB_WORKSPACE/propeller-swap-encoders
+            pytest --disable-warnings ./propeller-swap-encoders

.github/workflows/swap-encoders.yaml

@@ -0,0 +1,32 @@
+name: Swap encoders CI
+
+on:
+  pull_request:
+
+permissions:
+  id-token: write
+  contents: read
+
+env:
+  PYTEST_ADDOPTS: "--color=yes"
+
+jobs:
+  tests:
+    uses: propeller-heads/propeller-protocol-lib/.github/workflows/python-tests.yaml@dc/ENG-3545-make-encoders-lib
+
+  formatting:
+    name: Formatting
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+    - name: Check out Repo
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: Setup Env
+      uses: ./.github/actions/setup_env
+
+    - name: Black Formatting
+      run: |
+        black ./propeller-swap-encoders --check --skip-magic-trailing-comma