feat: extend init param with file creation for gh action

[BioPhoton]

Motivation

Create a scaffolding a workflow.yml file to integrate the GitHub action into the a repository.

Following things are related:

• get our next milestone done DX: Implement DX for second contact #45
• get more users for the GH action
• have a good DX for third party integrations

This feature in general will help to get access to all features related to CI automations.

Implementation

The init command will extend with one optinolan param generateGhWorkflow.

Option	Type	Default	Description
-g, --generateGhWorkflow	boolean	n/a	Generate user-flow.yml file under .github/workflows

Execution:
npx user-flow init --generateGhWorkflow

Description:

This command creates a GitHub workflow .github/workflows/user-flow.yml with the following content:

user-flow.yml

name: user-flow-gh-action-example
on:
  pull_request:
jobs:
  user-flow:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        node-version: [18.x]
    steps:
      - uses: actions/checkout@v2
      - name: Executing user-flow CLI
        uses: push-based/user-flow-gh-action@v<VERSION>

It will also prompt a hit for the user for possible next steps.
e.g. "GitHub workflow for user-flow integration set up under .github/workflows/user-flow.yml"

Todos

• Documantation
  • teaser in main readme
  • detail section in init command
• Implementation
  • add logic to process CLI params for --generateGhWorkflow alias -g as boolean no default value
  • add logic that composes this feature into commands/init/processes/generateGhWorkflow.ts
  • implement prompts to ask the user
  • integrate the generateGhWorkflow process into the init command
• Testing
  • test the function in isolation

Cases and combinations of parameters

**Legend:**  
- [nf] - flow file does not exist
- [f] - flow file does exist
- [F] - flow file creation
- [nF] - no flow file creation
- [P] - Prompt executes
- [L] - Log occurs
- [N] - no operation

Cases:

• [nf] init --interactive => [P]: "Setup workflow" -> Y:[F]/n[nF],
• [f] init --interactive => [L]: "File already here"; [nF]
• [nf] init --no-interactive => [N]
• [f] init --no-interactive => [N]
• [nf] init --interactive --generateGhWorkflow=> [L]: "File already here"; [nF]
• [f] init --interactive --generateGhWorkflow=> [F]
• [f] init --interactive --no-generateGhWorkflow=> [N]