validator to check if strong password exists

[MohakChugh]

A new Validator which checks if the password provided is a strong password or not.
A password is a strong password is it contains :

1. Capital Letter (at least 1)
2. Small Letter (at least 1)
3. Number (at least 1)
4. Special Character (at least 1)
5. Length (ateast 4)

[profnandaa]

Please clean up this PR to only include the relevant files needed for the feature work.

[tux-tn]

Hello @MohakChugh , i suggest you to read Contributing guidelines

• You pushed a .history folder with 131 files, you need to delete that folder
• You added your changes to /lib folder which is autogenerated, you need instead to use src/lib
• You need to add tests to your changes and a section in README.md if you are adding a new validator

[gayathrigs27]

#1148

[MohakChugh]

I removed the History and Deleted the file from lib folder. Sorry for not following the guidelines earlier

[profnandaa]

Can fix the merge conflicts?

[profnandaa]

Please redo this PR afresh, looks like to removed the important source file.

[profnandaa]

closing for #1148