Add bit_length() for integers

[AbdelrahmanKhaledd]

Related to #281

[AbdelrahmanKhaledd]

@namannimmo10 i've implemented it on llvm.

[namannimmo10]

Please add test before we review the code.

[namannimmo10]

Thanks for the PR!

We should:
a) resolve conflicts.
b) fix the warnings we get while compiling LPython
c) maybe rename IntBitLength to IntegerBitLen.
d) remove redundant test_builtin_str.py from the diff.

[AbdelrahmanKhaledd]

Thanks for the PR!

We should: a) resolve conflicts. b) fix the warnings we get while compiling LPython c) maybe rename IntBitLength to IntegerBitLen. d) remove redundant test_builtin_str.py from the diff.

I rebased and changed commits messages.

[namannimmo10]

I left some comments. Looks good though.

[AbdelrahmanKhaledd]

@namannimmo10
I added it to constant integer and to other kinds of integers.

[namannimmo10]

Please fix the warnings if you are getting any. We'd have to do that later otherwise.

[namannimmo10]

@certik @czgdp1807 -- PTAL.

[certik]

I think that looks good. After comments are addressed, it can be merged. Git history should be polished.

[AbdelrahmanKhaledd]

@namannimmo10
i have merged main previously, now i rebasing the branch but as you see all commits from main now here and i solved conflicts, is that the correct?

[namannimmo10]

If you do git rebase main (given that your local main branch is up to date), you'd see merge conflicts. You need to resolve them manually.

[namannimmo10]

@Abdelrahman-Kh-Fouad -- now we can add the string-related methods.