Added initial version of the formatter

[leviathanbeak]

No description provided.

[adlerjohn]

1. On my IDE, the indent size seems to be 2, despite being configured to be 4? Can you default it to 4 for the time being, until we have a .forcfmt.toml file. This was an IDE config issue on my end.
2. In a future PR (or maybe this one, actually), add a forc fmt command to run formatting without having to use an IDE. (Command-line formatter #80)
3. Bug: running formatting seems to be semantically destructive. If I write some random invalid syntax (e.g. change a bool to aool, instead of showing a compile error, the formatter clobbers the file and writes the latest valid file. This needs to be fixed in this PR.

[leviathanbeak]

@adlerjohn for 1. that is really weird, I am using IDE settings directly so whatever is set in your IDE Settings that is the indentation that's used in the formatter,

as for other two things, I'll try to add/fix by tomorrow

[adlerjohn]

@leviathanbeak well (1) will go away once we have a forcfmt.toml, so not a big deal.

[leviathanbeak]

@adlerjohn I have fixed the sync bug you reported