fix: silence detekt multiplatform type-resolution compiler-error noise

[rasros]

What changed

• Disable detekt's multiplatform type-resolution tasks (detektMainJvm/detektTestJvm) in com.eignex.lint, gated on the Kotlin Multiplatform plugin.

Why

On a Kotlin Multiplatform project, detekt's per-compilation type-resolution tasks compile every source set merged into a single module, without the kotlinx-serialization compiler plugin or the K2 fragment structure the real build uses. So @Serializable (the synthetic .serializer()) and expect/actual pairs resolve as errors, and detekt prints "N compiler errors found during analysis. This affects accuracy of reporting." The notice never fails the build, but it clutters output and degrades type-rule accuracy on exactly the files it can't resolve. This mirrors detekt's own detekt.multiplatform.disabled property, which can't be set from a precompiled-script plugin.

The per-source-set tasks (PSI-based) still enforce every rule this config enables, so multiplatform projects lose no active coverage. JVM-only projects are untouched — they have no expect/actual, and UnnecessaryFullyQualifiedName relies on their correctly-resolved type-resolution tasks.

Testing

• ./gradlew test green (incl. the JVM UnnecessaryFullyQualifiedName fails detektMain test, confirming JVM type-resolution tasks are unaffected).
• Verified against klause (a KMP consumer) via mavenLocal: with the patched plugin, detektMainJvm is disabled and :klause:check runs clean with no "compiler errors found during analysis" notice.

[rasros]

Closing: the fix would have disabled detekt's type-resolution tasks, which silently drops UnnecessaryFullyQualifiedName on KMP projects. The 'compiler errors found during analysis' notice is cosmetic (it doesn't disable the rule; only reduces accuracy on the few @Serializable/expect-actual files), and no detekt release (incl. 2.0.0-alpha.4) resolves the KMP analysis-compile gap. Leaving the warning in place rather than adding brittle fragment-args machinery to the shared plugin.