Add @deparse macro

[hyrodium]

This PR fixes #59, closes #56.

[hyrodium]

Hmm, not sure why the doctest fails..

julia> using Replay
[ Info: Precompiling Replay [dd78c5bf-19c4-4e9c-96ce-c3ec745c7812]

julia> @deparse 1+1
"1 + 1"

julia> @deparse sin(1f0+a)
"sin(1.0f0 + a)"

julia> @deparse f(x) = sin(x)/x  # Sometimes not work as expected
"f(x) = begin\n        sin(x) / x\n    end\n"

julia> versioninfo()
Julia Version 1.9.3
Commit bed2cd540a1 (2023-08-24 14:43 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 16 × AMD Ryzen 7 2700X Eight-Core Processor
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-14.0.6 (ORCJIT, znver1)
  Threads: 1 on 16 virtual cores

EDIT: I was forgetting to add @doc raw"..." to the docstring. I was confused because doctest(Replay, fix=true)does not fix the problem.

[terasakisatoshi]

@hyrodium How about \\n?

 julia --project=docs -e '
            using Documenter: DocMeta, doctest
            using Replay
            DocMeta.setdocmeta!(Replay, :DocTestSetup, :(using Replay); recursive=true)
            doctest(Replay)'

[terasakisatoshi]

nvm...

b0063c4 looks good to me

[terasakisatoshi]

🎉