replace relative paths "/wiki/" with $wgScriptPath

[simontaurus]

• Option1: $wgArticlePath for direct page links. May or may not contain query params, e.g. /wiki/ vs /w/index.php?title=
• Option2: $wgScript to build a query like $wgScript + ?title=<title>
• Option3: $wgScriptPath for $wgScriptPath + /index.php or /api.php + query string

js mw.config see https://www.mediawiki.org/wiki/Manual:Interface/JavaScript#mw.config or directly use mw.util.getUrl( 'MediaWiki:Foo.css', { action:'raw' } (see https://doc.wikimedia.org/mediawiki-core/master/js/#!/api/mw.util)

Also needs replacement in schemas:

{
    "@context": [
        "/wiki/Category:Item?action=raw&slot=jsonschema"
    ],
    "allOf": [
        {
            "$ref": "/wiki/Category:Item?action=raw&slot=jsonschema"
        }
    ]
}

to

{
    "@context": [
        "./Category:Item?action=raw&slot=jsonschema"
    ],
    "allOf": [
        {
            "$ref": "./Category:Item?action=raw&slot=jsonschema"
        }
    ]
}

(requires pretty urls, "./" is required because ":" is not allowed in the first path segment)
or

{
    "@context": [
        "./index.php?title=Category:Item&action=raw&slot=jsonschema"
    ],
    "allOf": [
        {
            "$ref": "./index.php?title=Category:Item&action=raw&slot=jsonschema"
        }
    ]
}

see also: https://stackoverflow.com/questions/24028561/relative-path-in-html

ToDo:
replace all "/w/api..." with mw.config.get("wgScriptPath") + "/api..."

replace all "/wiki/title" with mw.util.getUrl("title")

• fix extension MwJson
• fix extension OpenSemanticLab
• fix extension InteractiveSemanticGraph
• fix editor extensions
• fix OpenSemanticWorld-Schemas (minor, already handled by bundler in MwJson)