Better CommonMark comment detection

[hawkeyexl]

CommonMark syntax allows for comments surrounded by (), ''', or "", and some tools (such as Prettier) like to mix comment usage. Right now Doc Detective prefers (), but it should be flexible enough to support all variations.

Right now, this markdown is correctly resolved:

[comment]: # (test {"testId": "uppercase-conversion", "detectSteps": false})

1. Open the app at [http://localhost:3000](http://localhost:3000).

[comment]: # (step {"goTo": "http://localhost:3000"})

2. Type "hello world" in the input field.

[comment]: # (step {"find": {"selector": "#input", "click": true}})
[comment]: # (step {"type": "hello world"})

3. Click **Convert to Uppercase**.

[comment]: # (step {"find": {"selector": "button", "click": true}})

4. You'll see **HELLO WORLD** in the output.

[comment]: # (step {"find": "HELLO WORLD"})
[comment]: # (test end)

Resolved tests:

{
  "specId": "a326c357-84b4-489a-889c-c077cfb2cbe4",
  "contentPath": "/home/hawkeyexl/Workspaces/resolver/dev/doc-content.md",
  "tests": [
    {
      "testId": "uppercase-conversion",
      "detectSteps": false,
      "steps": [
        {
          "goTo": "http://localhost:3000"
        },
        {
          "find": {
            "selector": "#input",
            "click": true
          }
        },
        {
          "type": "hello world"
        },
        {
          "find": {
            "selector": "button",
            "click": true
          }
        },
        {
          "find": "HELLO WORLD"
        }
      ]
    }
  ]
}

While the following Markdown doesn't resolve correctly, it should:

[comment]: # 'test {"testId": "uppercase-conversion", "detectSteps": false}'

1. Open the app at [http://localhost:3000](http://localhost:3000).

[comment]: # 'step {"goTo": "http://localhost:3000"}'

2. Type "hello world" in the input field.

[comment]: # 'step {"find": {"selector": "#input", "click": true}}'
[comment]: # 'step {"type": "hello world"}'

3. Click **Convert to Uppercase**.

[comment]: # 'step {"find": {"selector": "button", "click": true}}'

4. You'll see **HELLO WORLD** in the output.

[comment]: # 'step {"find": "HELLO WORLD"}'
[comment]: # "test end"