Add jump to definition

[Nacho Cordón]

Add the ability to jump to definition for a variable in a query:

MATCH (this:`Person`)
WHERE (this.name STARTS WITH $param0 AND EXISTS {
    MATCH (this)-[:ACTED_IN]->(this0:`Movie`)
    WHERE (this0.title CONTAINS $param1 AND EXISTS {
        MATCH (this1:`Person`)-[:ACTED_IN]->(this0)
        WHERE (this1.name CONTAINS $param2 AND EXISTS {
            MATCH (this1)-[:ACTED_IN]->(this2:`Movie`)
            WHERE (NOT (this2.title = $param3) AND EXISTS {
                MATCH (this3:`Person`)-[:ACTED_IN]->(this2)
                WHERE (this3.name CONTAINS $param4 AND NOT (EXISTS {
                    MATCH (this3)-[:ACTED_IN]->(this4:`Movie`)
                    WHERE this4.title = $param5
                }))
            })
        })
    })
})


RETURN this { .name } AS this

When I click on the this, it would take me to the this in the first line of the query

[Nacho Cordón]

Duplicated from #11