chore: add #__NO_SIDE_EFFECTS__ notation to defineStore

[serkodev]

Fix #2738

In defineStore, certain behaviors of createSetupStore and createOptionsStore might prevent the bundler from performing static analysis to determine whether there are any side effects.

Therefore, in this PR, the defineStore function is marked as having no side effects, enabling the bundler to tree-shake stores that are not used after being defined.

References

https://github.com/javascript-compiler-hints/compiler-notations-spec/blob/main/no-side-effects-notation-spec.md
rollup/rollup#5024

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[posva]

Thanks a lot! So there is a way to improve it!