feat: add ignore file configuration

[danteay]

Description

Add new options to configure an ignore file to create rules that allows to skip the check on certain keys if the file matches with the specified ignore pattern.

Task Context

What is the current behavior?

• No way to skip check on specific keys

What is the new behavior?

• New action argument ignore_file that represents a path to an ignore json file for the action (default is .json-diff-ignore.json on project root)

Additional Context

Struct of the ignore file:

[
  {
    "pattern": "regexp/file\\.json$",
    "ignoreKeys": ["key1"]
  },
  {
    "pattern": "regexp/file2\\.json$",
    "ignoreKeys": ["key2"]
  }
]