Python API implementation (#2195)

* Draft implementation

* Fix style

* Add api tests

* Fix lint

* Update docs

* Update tests

* Set env

* Fixup

* Fixup

* Fix lint

* Revert

.github/workflows/inference_tests.yml

@@ -31,10 +31,13 @@ jobs:
           cache-dependency-path: 'requirements*'
       - name: check OS
         run: cat /etc/os-release
+      - name: set ENV
+        run: export TRAINER_TELEMETRY=0
       - name: Install dependencies
         run: |
           sudo apt-get update
           sudo apt-get install -y --no-install-recommends git make gcc
+          sudo apt-get install espeak-ng
           make system-deps
       - name: Install/upgrade Python setup deps
         run: python3 -m pip install --upgrade pip setuptools wheel