Support download as JSON File

[MRKKmrkk]

What type of PR is this?

• Refactor
• Feature
• Bug Fix
• New Query Runner (Data Source)
• New Alert Destination
• Other

Description

This PR allows users to download datasets in JSON format.

How is this tested?

• Unit tests (pytest, jest)
• E2E Tests (Cypress)
• Manually
• N/A

Download json file Manually

Mobile & Desktop Screenshots/Recordings (if there are UI changes)

[eradman]

To make this more like "Download CSV" and the others we would only return the query_result.data.colums, not the entire data structure returned by the server:

{
  "query_result": {
    "id": 3,
    "query_hash": "4c17f9caf181346f94b122d1bec7d875",
    "query": "SELECT * FROM pg_stat_statements",
    "data": {
      "columns": [
        {
          "name": "userid",
          "friendly_name": "userid",
          "type": null
        },
        {
          "name": "dbid",
          "friendly_name": "dbid",
          "type": null
        },
...