ES-2352 - support conditional types

[jgrantr]

• This allows for having an object that is either a string or a JSON object. Without this, you can't do that cleanly.

---

Note

Introduces FastParseType.IfString and updates fieldParsers to only set values when the field is a non-JSON string.

• Parser Types:
  • Add FastParseType.IfString with docs for fields that may be plain strings or JSON.
• Parsing Logic:
  • Implement IfString handler in fieldParsers to skip setting when value looks like JSON ({ or [), otherwise set normally.

^{Written by Cursor Bugbot for commit 6210822. This will update automatically on new commits. Configure here.}

[ch-snyk-sa]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scanner	Critical	High	Medium	Low	Total (0)
✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues
✅	Open Source Security	0	0	0	0	0 issues

💻 Catch issues earlier using the plugins for VS Code, JetBrains IDEs, Visual Studio, and Eclipse.