Add API smwbrowse module

[mwjames]

This PR is made in reference to: #

This PR addresses or contains:

• Adds smwbrowse as API module (required for an upcoming feature) and currently supports the search for
  • properties
  • categories
  • concepts
• Does a similar thing like browsebyproperty but that module was not easily extendable therefore rewrote it from scratch, eventually it will be deprecated and removed
• It is expected to incorporate browsebysubject at a later state so that this module can be scrapped as well
• Classes and responsibilities are split into:
  • Browse (API, MediaWiki)
  • ListLookup (primary selector),
  • ListAugmentor (adding additional field components) with
    • property to support:
      • description to pull the Has property description in a selected language
      • prefLabal to fetch the Has preferred property label in a selected language
      • usageCount retrieve the usage count of the property
  • LookupCache caches each request for 1 h (can be changed using smwgCacheUsage and api.browse) and by this avoids to introduce some complex invalidation strategy, yet keeping requests close to up-to-date information

Example

'api.php?action=smwbrowse&browse=property&params={ "limit": 10, "offset": 0, "search": "Date" }',
'api.php?action=smwbrowse&browse=property&params={ "limit": 10, "offset": 0, "search": "Date", "description": true }',
'api.php?action=smwbrowse&browse=property&params={ "limit": 10, "offset": 0, "search": "Date", "description": true, "prefLabel": true }',
'api.php?action=smwbrowse&browse=property&params={ "limit": 10, "offset": 0, "search": "Date", "description": true, "prefLabel": true, "usageCount": true }',
'api.php?action=smwbrowse&browse=category&params={ "limit": 10, "offset": 0 }',
'api.php?action=smwbrowse&browse=category&params={ "limit": 10, "offset": 0, "search": "Date" }',
'api.php?action=smwbrowse&browse=concept&params={ "limit": 10, "offset": 0 }'
'api.php?action=smwbrowse&browse=concept&params={ "limit": 10, "offset": 0, "search": "Date" }'

Output

{
    "query": {
        "Has_description": {
            "label": "Has description",
            "key": "Has_description",
            "description": {
                "en": "Simple descriptive explanatory text property."
            },
            "prefLabel": {
                "en": ""
            }
        },
        "_PDESC": {
            "label": "Has property description",
            "key": "_PDESC",
            "description": {
                "en": ""Has property description" is a predefined prop..."
            },
            "prefLabel": {
                "en": ""
            }
        }
    },
    "query-continue-offset": 0,
    "version": 1,
    "meta": {
        "type": "property",
        "limit": 10,
        "count": 2,
        "isFromCache": "",
        "queryTime": 0.00051
    }
}

This PR includes:

• Tests (unit/integration)
• CI build passed

Fixes #

[kghbln]

Documented on wiki