feat(linter): implement @typescript-eslint/explicit-function-return-type

[kaykdm]

Related issue: #2180

original implementation

• code: https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/eslint-plugin/src/rules/explicit-function-return-type.ts
• test: https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/eslint-plugin/tests/rules/explicit-function-return-type.test.ts
• doc: https://typescript-eslint.io/rules/explicit-function-return-type/

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[codspeed-hq]

CodSpeed Performance Report

Merging #3455 will not alter performance

_{Comparing kaykdm:explicit-function-return-type (f2f4572) with main (b58d8eb)}

Summary

✅ 22 untouched benchmarks