Adding support for fetching boost

[PritK99]

Fixes
#7
#9 (comment)

[SAtacker]

@PritK99 you'll have to change the CI for all the platforms and remove boost installation.
Also rebase your branch on master and sign off your commits.

[SAtacker]

Have a look in the .github folder and look for workflows.

[SAtacker]

Can we enable only some part of boost for spirit instead of cloning all of it?

[PritK99]

Can we fetch only https://github.com/boostorg/spirit.git and https://github.com/boostorg/regex.git instead of fetching https://github.com/boostorg/boost.git as whole ?
The code builds in ubuntu if we just fetch boost for spirit and regex.

[SAtacker]

Can you try to fetch spirit only and please let me know?

[PritK99]

Added code to fetch boost spirit only instead boost as whole.
Please review.

[SAtacker]

Added code to fetch boost spirit only instead boost as whole.
Please review.

Thanks, just two more things.

1. Change the github CI workflow file. It has boost library installs using the package manager like vcpkg for windows and apt for linux. Just remove those lines in the workflow CI yaml file.
2. Check out the issue Windows build failing  #9 (comment) that explains why the windows build fails. Please resolve that as well.

[SAtacker]

Merged in #16