Support @config overrides for extension functions

[Frotty]

Summary

• support @config replacements for package extension functions
• match configured functions by exact callable ABI, including receiver, overloads, varargs, return types, and alpha-equivalent generic parameters
• apply configured extension definitions centrally during member lookup while preserving overload and receiver metadata
• keep class and module methods outside package configuration replacement

Acceptance criteria

• configured extension calls use the configured body globally, including dependency-package calls
• overloads resolve independently and unmatched overloads keep their original implementation
• mismatched receiver, parameter, return, vararg, and generic signatures are rejected
• cascade and extension-operator calls use the configured definition
• import initlater config dependencies compile without an initialization cycle
• translation remains a normal direct call with no runtime dispatch machinery

Validation

• ./gradlew test --tests tests.wurstscript.tests.ConfigPackageTests — passed after rebasing onto origin/master; includes Jass and Lua execution
• ./gradlew test — passed after rebasing onto origin/master in 3m 55s
• git diff --check — passed

Known gaps

• Wurst code function references cannot target extension functions because their implicit receiver counts as a parameter; that pre-existing language restriction is unchanged.

[Frotty]

@codex review

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 7cbf091f3c

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[Frotty]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Keep them coming!

Reviewed commit: cc984016b2

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".