fix: type TypeWithVersion missing latest property (#14676)

### What?

Adds the missing `latest?: boolean` property to the `TypeWithVersion<T>`
type definition.

### Why?

The `latest` property is set by database adapters when creating and
updating versions (both collection and global versions), and is included
in the version field schema when drafts are enabled. However, it was
missing from the TypeScript type definition, causing type errors when
consumers try to access this property on version documents.

### How?

Added `latest?: boolean` as an optional property to the
`TypeWithVersion<T>` type. The property is optional because it's only
present when drafts are enabled in the version configuration.

Fixes #14624

Author: PatrikKozak

packages/payload/src/versions/types.ts

@@ -122,6 +122,7 @@ export type SanitizedGlobalVersions = {
 export type TypeWithVersion<T> = {
   createdAt: string
   id: string
+  latest?: boolean
   parent: number | string
   publishedLocale?: string
   snapshot?: boolean