Adds the "position" metadata to the metadata allowlist in the search index, which
    enables position information for each search term in the search results at the expense of index size.
    
    - Namespace
- Statiq.Lunr 
- Containing Type
- GenerateLunrIndex
Syntax
public GenerateLunrIndex AllowPositionMetadata(bool allowPositionMetadata = true)Remarks
    See https://lunrjs.com/guides/core_concepts.html for more information.
    
		Parameters
| Name | Type | Description | 
|---|---|---|
| allowPositionMetadata | bool | trueto add position metadata to the allowlist,falseotherwise. | 
Return Value
| Type | Description | 
|---|---|
| GenerateLunrIndex | The current module instance. |