Add support for &- and |-syntax and make OR/AND support work in general

[anderson4j]

Before we had support for queries like MATCH (n) WHERE n:A AND n:B AND n:C but only one special case for OR (for testing)

Now we support any OR-usage, even nested cases like MATCH (n) WHERE n:A AND n:B OR n:C AND n:D
(where AND is evaluated first, so we get n { OR(AND(A,B), AND(C,D)) } )

Also, we didnt support the &/|-syntax for and/or which can be used in MATCH, or as an alternative in WHERE. Now we do!
ex. MATCH (n:A&B) WHERE n:C|D -> n { AND(A, B, OR(C,D)) } )

Closes LS-5
Closes LS-6
Closes LS-84

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[anderson4j]

Didnt add a dedicated test for these in the PR adding anon vars, but I figure its nice to have

[OskarDamkjaer]

Could we have an example for anonymous relationship as well?

[anderson4j]

Your wish is my command