feat: Add start in VSCode option and support python for dev container (#619)

.changeset/few-chicken-exercise.md

.changeset/plenty-onions-relate.md

packages/create-llama/create-app.ts

packages/create-llama/helpers/devcontainer.ts

packages/create-llama/helpers/llama-pack.ts

packages/create-llama/helpers/python.ts

packages/create-llama/helpers/types.ts

packages/create-llama/helpers/typescript.ts

packages/create-llama/index.ts

packages/create-llama/questions.ts

packages/create-llama/templates/devcontainer.json