chore: Use unreachable exception in favor of type safety

[fa93hws]

🤔 This is a ...

• New feature
• Bug fix
• Site / document update
• Component style update
• TypeScript definition update
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

👻 What's the background?

Switch is not type safe.
e.g.

type Pet = 'dog' | 'cat';

function getPet(pet: Pet) {
  switch(pet) {
    case 'dog':
        return new Dot();
    case 'cat':
        return new Cat();
    default:
        throw new Error('unknown pet');
  }
}

Which looks good now.

However, if another value is added to the enum, e.g. type Pet = 'dog' | 'cat' | 'hamster'.
The getPet function stay silent in the compile time.
It may (or may not) throw an error in the run time which is error prone.

💡 Solution

It is possible to utilize the never type in typescript to force the switch statement to behave like an exhaustive pattern match to enhance the type safety.

All occurrence will be changed if the gist of this PR is preferred.

📝 Changelog

Language	Changelog
🇺🇸 English
🇨🇳 Chinese

☑️ Self Check before Merge

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

[tests-checker]

Could you please add tests to make sure this change works as expected?

[fa93hws]

Suggested change

	console.warn(new UnreachableException(size));
	console.warn(new UnreachableException(size));
	break;

[ant-design-bot]

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[codecov]

Codecov Report

Merging #22933 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master   #22933   +/-   ##
=======================================
  Coverage   98.31%   98.31%           
=======================================
  Files         363      364    +1     
  Lines        7253     7258    +5     
  Branches     1978     1991   +13     
=======================================
+ Hits         7131     7136    +5     
  Misses        122      122           

Impacted Files	Coverage Δ
components/_util/unreachableException.ts	100.00% <100.00%> (ø)
components/button/button-group.tsx	100.00% <100.00%> (ø)

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[afc163]

Could you add test case?

[fa93hws]

Could you add test case?

👌
75136e0