ft/add support for monotonic/sequential IDs and move the generation options class

[bolorundurowb]

• Handles Is ID continuously used to reduce database index fragmentation #23 by adding sequential ID support which should help with database fragmentation
• Addresses the feedback in Move GenerationOptions #17 by renaming the GenerationOptions class to the ShortIdOptions and moving it from the configurations namespace to the root namespace.

Thanks to @vanillajonathan and @skyxioo for the feedback

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 93.05556% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.42%. Comparing base (6a2aa37) to head (8c3362c).

Files with missing lines	Patch %	Lines
src/shortid/Utils/CommonUtilities.cs	83.33%	2 Missing and 1 partial ⚠️
src/shortid/ShortId.cs	95.34%	0 Missing and 2 partials ⚠️
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HEAD has 1 upload less than BASE

Flag	BASE (6a2aa37)	HEAD (8c3362c)
	2	1

Additional details and impacted files

@@             Coverage Diff             @@
##            master      #28      +/-   ##
===========================================
- Coverage   100.00%   93.42%   -6.58%     
===========================================
  Files            3        3              
  Lines           56       76      +20     
  Branches         8       12       +4     
===========================================
+ Hits            56       71      +15     
- Misses           0        2       +2     
- Partials         0        3       +3     

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