feat(NanoID) : Created a nanoid validator

[Durgeshwar-AI]

Created a validator for the nanoid which is notable for being fast, small, and having no external dependencies, making it a popular alternative to UUIDs and also added tests for nanoid and isDecimal(Which was absent previously)

https://github.com/ai/nanoid
https://www.mtechzilla.com/blogs/why-nano-id-is-better-than-uuid#:~:text=The%20collision%20probability%20analysis%20reveals,to%20UUID's%2036%2Dcharacter%20format.

Checklist

• PR contains only changes related; no stray files, etc.
• README updated (where applicable)
• Tests written (where applicable)
• References provided in PR (where applicable)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (6f436be) to head (9be4820).

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2607   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          114       115    +1     
  Lines         2536      2552   +16     
  Branches       642       645    +3     
=========================================
+ Hits          2536      2552   +16     

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