feat(Form): make error prop shorthand in Form.Field

[bubunyo]

Fixes #3602.

This PR makes error prop in Form.Field shorthand that allows to define custom error message inside it.

<Form.Input  error='Please enter your last name' label='Last name' />
<Form.Checkbox
  label='I agree to the Terms and Conditions' 
  error='You must agree to the terms and conditions'
/>

[welcome]

💖 Thanks for opening this pull request! 💖

Here is a list of things that will help get it across the finish line:

• Run yarn lint locally to catch formatting errors. This will fix some errors automatically, commit and push any changes.
• Run yarn test locally to catch errors. This ensures all components still behave as they should.
• Run yarn start to run the doc site locally and try a few pages, ensuring everything is in good working order.
• Include tests when adding/changing behavior.

We get a lot of pull requests on this repo, so please be patient and we will get back to you as soon as we can.

[codecov-io]

Codecov Report

Merging #3603 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #3603      +/-   ##
==========================================
+ Coverage   99.83%   99.83%   +<.01%     
==========================================
  Files         174      174              
  Lines        3100     3104       +4     
==========================================
+ Hits         3095     3099       +4     
  Misses          5        5

Impacted Files	Coverage Δ
src/collections/Form/FormField.js	100% <100%> (ø)	⬆️

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[layershifter]

https://semantic-ui.com/behaviors/form.html#validating-on-blur-and-other-events

SUI has similar thing actually, will share more thoughts tomorrow.

[bubunyo]

Sure, As much as the SUI way attempts to solve the same problem, I think their way can be easily replicated, using already existing components. I don't see this PR being merged unless there is an earlier PR on SUI to deals with the formatting. CSS is not my strong suit, but I am attempting to submit a PR for that. I will welcome any help on that.

[layershifter]

@bubunyo I pushed some updates to this PR, can you please check? 🙏

[welcome]

Congrats on merging your first pull request! 🎉🎉🎉