feat(dx): throw an error if store id is missing

[skirtles-code]

Calling defineStore without an id appears to succeed, but it fails when calling useStore:

Cannot read properties of undefined (reading 'startsWith')
    at devtoolsPlugin (pinia.mjs:925:19)
    at pinia.mjs:1631:48
    at EffectScope.run (reactivity.esm-bundler.js:37:24)
    at pinia.mjs:1631:38
    at Array.forEach (<anonymous>)
    at createSetupStore (pinia.mjs:1628:14)
    at createOptionsStore (pinia.mjs:1223:13)
    at useStore (pinia.mjs:1705:17)

The undefined id causes various other problems, but this just happens to be the first line that throws an error.

I've encountered this a few times on Vue Land, so I thought it might be better to have an explicit error in dev that explains what the problem is.

[netlify]

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[codecov-commenter]

Codecov Report

Merging #2167 (edb8385) into v2 (1d27718) will decrease coverage by 0.18%.
The diff coverage is 0.00%.

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@@            Coverage Diff             @@
##               v2    #2167      +/-   ##
==========================================
- Coverage   94.69%   94.51%   -0.18%     
==========================================
  Files          12       12              
  Lines        3242     3248       +6     
  Branches      219      219              
==========================================
  Hits         3070     3070              
- Misses        168      174       +6     
  Partials        4        4              

Impacted Files	Coverage Δ
packages/pinia/src/store.ts	84.07% <0.00%> (-0.53%)	⬇️

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[posva]

Thanks 🙌