Feature Request: Add rule for indentation similar to yamllint

[dawidmalina]

Here's the indentation rule in yamllint: https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.indentation

the following code snippet would fail:

/path/to/file1:
 file.managed:
    - contents: This is line 1

the following code snippet would fail:

/path/to/file1:
    file.managed:
      - contents: This is line 1

the following code snippet would pass:

/path/to/file1:
  file.managed:
    - contents: This is line 1

[dawidmalina]

I have quite naive implementation (looking for the line starting with odd spaces - like 1,3,5,7,9) but doing enough to find simple mistakes. I will drop pull request this week.

[roaldnefs]

Closing this issue in favour of #240.