feat: Allow parsing/compiling of content only data without files and include declaration files

[Saw-mon-and-Natalie]

This PR extends the parsing/compiling functionality so that we can also parse data without the need to have the data to be stored in a file beforehand. This is useful if other libraries/packages would like to use huffc in their codebases.

Also, we have modified the tsconfig.json file so that the yarn build process would emit declaration and mapping files. Again, this is useful when huffc is being used in other packages.

The minor version for the package.json has also been incremented.

I've tried to keep the commits in this PR as atomic as possible for an easier review process.