docs(linter): Move documentation comments for the valid-typeof rule to the struct

[connorshea]

This ensures the autogenerated documentation handles the configuration section. Part of #14743.

The generated docs look like this (but without the backslashes before the code blocks):

## Configuration

This rule accepts a configuration object with the following properties:

### requireStringLiterals

type: `boolean`

default: `false`

The `requireStringLiterals` option when set to `true`, allows the comparison of `typeof`
expressions with only string literals or other `typeof` expressions, and disallows
comparisons to any other value. Default is `false`.

With `requireStringLiterals` set to `true`, the following are examples of **incorrect** code:
\```js
typeof foo === undefined
typeof bar == Object
typeof baz === "strnig"
typeof qux === "some invalid type"
typeof baz === anotherVariable
typeof foo == 5
\```

With `requireStringLiterals` set to `true`, the following are examples of **correct** code:
\```js
typeof foo === "undefined"
typeof bar == "object"
typeof baz === "string"
typeof bar === typeof qux
\```

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[Copilot]

Pull Request Overview

This PR relocates the documentation for the requireStringLiterals configuration option from the rule's main documentation block to the struct field, enabling auto-generated configuration documentation. The change improves documentation structure by allowing the configuration section to be automatically generated from the struct's field comments.

• Moved requireStringLiterals documentation from declare_oxc_lint! macro to the ValidTypeof struct field
• Added JsonSchema derive and serde attribute to enable configuration schema generation
• Added config = ValidTypeof parameter to declare_oxc_lint! macro to link the configuration

---

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[codspeed-hq]

CodSpeed Performance Report

Merging #14841 will not alter performance

_{Comparing connorshea:valid-typeof-docs (fb762ee) with main (d0faa7c)}

Summary

✅ 4 untouched
⏩ 33 skipped¹

Footnotes

1. 33 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[camc314]

Thank you!