Consolidate encodeConstrNames and encodeRecordFields options into a single option

[adithyaov]

How will this work? These are two distinct options.

[adithyaov]

TODO: Write an example for why these options need to be distinct before closing this issue.

[adithyaov]

Consider,

data Record = A { f :: Int } | B { g :: String }

On encode (A 1),

Without any options: "01" With encodeConstrNames: "A1" With encodeRecordFields: "Af1"