[Database] Add SQLite support

[rrr63]

Refactor database grammar to allow multiple drivers.
Add SQLite driver

#11

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[techmahedy]

@rrr63, great to see that you started, but remember we have almost 2 months in our hands for our first release, so take your time.

[rrr63]

@techmahedy Yes for sure, it is just the first push, not ready yet.
Btw, I think you should open the new doc to PR, i saw some things to change there

[techmahedy]

@rrr63, of course, you can share about this "I think you should open the new doc to PR, i saw some things to change there".

[rrr63]

@techmahedy I can't open PR because the doc : https://github.com/doppar/docs does not seem to be the current website

[techmahedy]

@rrr63 Exactly, this is not the current one, I will update it

[techmahedy]

@rrr63 https://github.com/doppar/docs Updated, you can check this.

[rrr63]

@techmahedy perfect, what is the doc engine to reproduce it locally ?
Perhaps, I think you should prepare project with more contributing guides to attract more contributors.
I can help you by this way if you want

[techmahedy]

@rrr63 if you help me, it will be very beneficial for doppar, you are a most senior person that's why i added you to doppar team to make doppar more professional. Very glad to hear that. You can share your mail so that i can add you in my slack channel.

[rrr63]

@techmahedy I sent you an email

[rrr63]

@techmahedy This PR is open to code review

[techmahedy]

Ok @rrr63

[techmahedy]

@rrr63 my last commit: "fix: mysql enum values and adding grammar-based query in eloquent builder:"

Everything should work now. Please check everything and let me know. I tried to fix everything.