[KOTLIN]: add 'bestEffortBacktick' naming option for Kotlin enums

[Picazsoo]

Adds a new enum handling option for kotlin generators called bestEffortBacktick, that tries to preserve enum names (without backticks) then falls back to backtick format where possible and only then falls back to sanitization of problematic characters.

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Summary by cubic

Adds a new Kotlin enum naming option that preserves original enum values by using backtick-escaped identifiers when safe. This keeps values like name,asc and numeric names intact and reduces mangled enum names.

• New Features

  • New enumPropertyNaming: bestEffortBacktick for all Kotlin generators.
  • Behavior: use plain identifier if valid and not reserved; else wrap in backticks if safe; else fall back to sanitization.
  • Improves sort/order enums (e.g., name,asc) and numeric-like values (e.g., 1), and handles reserved words via backticks.
  • Updated docs and regenerated Kotlin samples; added tests to cover edge cases.

• Migration

  • Opt-in via config: in YAML additionalProperties: enumPropertyNaming: bestEffortBacktick, or CLI --additional-properties enumPropertyNaming=bestEffortBacktick.
  • Default remains original. Names only change if you enable this option.

^{Written for commit 215eab8. Summary will update on new commits.}

[cubic-dev-ai]

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