docs: fix tsconfig "target" default value

[zac1st1k]

This pull request updates the documentation and configuration logic for the default value of the TypeScript target option. The main change is to clarify that the default target is esnext when the module option is set to either nodenext or preserve, rather than just nodenext.

Documentation and configuration updates:

• Updated the documentation in Compiler Options.md to state that the default target is esnext if module is nodenext or preserve, instead of only nodenext.
• Updated the defaultsForOptions logic in tsconfigRules.ts to match the new documentation, reflecting that target defaults to esnext for both nodenext and preserve module options.

[zac1st1k]

reference

https://github.com/microsoft/TypeScript/blob/0105bbb63689372f2cbeec7c884c27906ac0ef7f/src/compiler/program.ts#L980

[zac1st1k]

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