WIP

Need add handling "tags" in json file (in headers block it means available tags, in questions block mean question tags)

Describe the solution you'd like

Add ability to add manually json on settings page instead of using links

Describe the solution you'd like
Need to add the ability to enable a dark theme

Valid JSON for Example:

{
   ...
  "questions": [
    {
       ...
      "hint": "hint for question"
    }
  ]
}

If filled field hint as empty, then parsing the questions throw error and will not work.

Not valid JSON:

{
   ...
  "questions": [
    {
       ...
      "hint": ""
    }
  ]
}

Is your feature request related to a problem? Please describe.

Describe the solution you'd like

Need rewrite app using angular 8+ version

Describe alternatives you've considered

Additional context