[#193] Remove tezos-bake-monitor-lib dependency

Description

Problem: We use tezos-bake-monitor-lib to implement conversion between Value to JSON by binary round trip. Since we already have Value to binary, tezos-bake-monitor-lib allow us to convert binary to Expression then to JSON.

However, this dependency has a few problem include: not quite stable and not on Hackage which make morley not being able to built on Hackage.

Solution: Remove tezos-bake-monitor-lib and implement the binary round trip ourselves.

Related issue(s)

Resolves #193 (closed)

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