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/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