Feat: add Rosé Pine Dawn theme

[echoriiku]

• Added Rosé Pine Dawn theme JSON
• Added Rosé Pine Dawn CSS for code blocks

[github-actions]

Your preview URL is: https://theme-builder.notesnook.com/notes?from_pr=streetwriters/notesnook-themes/86

[github-actions]

JSON and YAML Validation Results

JSON Validation Results

• ✅ File(s) Passed: 1
• ❌ File(s) Failed: 4
• ⏭️ File(s) Skipped: 0

Violations:

[
  {
    "file": "themes/tokyonight-day/v1/theme.json",
    "errors": [
      {
        "path": "/authors/1",
        "message": "must have required property 'name'"
      }
    ]
  },
  {
    "file": "themes/tokyonight-moon/v1/theme.json",
    "errors": [
      {
        "path": "/authors/1",
        "message": "must have required property 'name'"
      }
    ]
  },
  {
    "file": "themes/tokyonight-dark/v1/theme.json",
    "errors": [
      {
        "path": null,
        "message": "Invalid JSON"
      }
    ]
  },
  {
    "file": "themes/tokyonight-light/v1/theme.json",
    "errors": [
      {
        "path": null,
        "message": "Invalid JSON"
      }
    ]
  }
]

YAML Validation Results

• ✅ File(s) Passed: 3
• ❌ File(s) Failed: 2
• ⏭️ File(s) Skipped: 0

Violations:

[
  {
    "file": "themes/tokyonight-dark/v1/theme.json",
    "errors": [
      {
        "path": null,
        "message": "Invalid YAML"
      }
    ]
  },
  {
    "file": "themes/tokyonight-light/v1/theme.json",
    "errors": [
      {
        "path": null,
        "message": "Invalid YAML"
      }
    ]
  }
]

[revsuine]

If the Rosé Pine Dawn theme is ready to be merged, could you separate out the Tokyo Night changes into a separate branch so it can have a separate PR and we can add the dawn variant without merging the Tokyo Night changes? Also I assume you've spoken to Andres about the Tokyo Night change, but in any case that can be sorted out in the Tokyo Night PR