cookie.Manager and DefaultManager

[syntaqx]

Based on some changes in the latest version, as well as some optimizations I think we're able to do to the package overall, this changeset contains the following major changes:

• cookie.Manager is now the primary API to the package
• cookie.DefaultManager is initialized and provides API stability for the global Set/Get/... methods.
• Options API Change:
  • cookie.NewManager(cookie.WithSigningKey(signingKey))
• Introduction of CustomTypeHandler so we no longer impose a specific dependency (gofrs/uuid)
• Significant upgrade to the PopulateFromCookies functionality
• File organization for better separation of functionality and tests
• Removal of DefaultOptions - The mergeOptions functionality wasn't working well anyways.
• Adds omitempty to silently ignore missing cookies.

While I hope this introduces the least amount of API breakage as possible, I hope the new API will be significantly more stable than the previous iterations and this can be the foundation for moving forward.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (b7e9622) to head (06ba184).

Additional details and impacted files

@@            Coverage Diff            @@
##              main        #8   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         5    +4     
  Lines          146       189   +43     
=========================================
+ Hits           146       189   +43     

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[ccoVeille]

I appreciate you consider this rewriting

[syntaqx]

@ccoVeille We'll see how the experiment goes, but I'm certainly willing to entertain it for now.

I've finished my initial pass of just the Cookie Manager. I'll start looking at what it might take to introduce a DefaultManager that allows for API compatibility with the global method usage, but allows the use to run off the default, or specific managers.

Would love any feedback from the first pass.

[syntaqx]

It seems to me that providing the DefaultManager will work for the things I wanted it to do, and fixes the issues you were seeing. Tests are -race in CI, and I'm not seeing any major issues.

I'll leave this open for feedback while I sleep and check back in, and maybe we can get this merged in if I don't come up with any reasons not to between now and then.

[ccoVeille]

Small remark about README, except that 👍