fix: route networkmock logging through Kermit

[MaxMichel2]

Summary

Closes #86.

devview-networkmock-core and devview-networkmock-ktor emitted ~35 unconditional println calls covering config loading, request matching, and response serving, with no way to turn them off. This routes all of them through Kermit — already a dependency of every DevView library module via the multiplatform convention plugin, and already used by devview-networkmock's own UI (LocalMockColorScheme.kt) — so this adds no new dependency and no new abstraction.

What changed

• MockConfigRepository: spec-load success logs at debug, load failures at warn with the throwable attached, request-matching outcomes at verbose.
• NetworkMockPlugin: the previous per-request trace (up to ~15 lines including 7 decorative ==== separators) collapses into one line per intercepted request, e.g.:

  GET /v1/users/42 -> MOCK 200/default
  GET /v1/users/42 -> NETWORK (no operation match)
  

• All logs are tagged DevViewNetworkMock — the same tag devview-networkmock's UI already uses — so a host can filter every NetworkMock log line by tag regardless of which module emitted it, and devview-consolelogger, if installed, captures them automatically via its Kermit LogWriter.
• No response body content is ever logged — status code + example name is the whole useful payload.
• Detekt's ForbiddenMethodCall rule (flagging kotlin.io.println/print) is flipped from active: false to active: true repo-wide. Verified clean — these two files were the only main-source println call sites in the repo.
• No new opt-out flag: a host silences/adjusts verbosity via Kermit's own Logger.setMinSeverity(...), documented in the module docs.

Not in scope

No public API change — no apiDump needed.

Verification

.\gradlew.bat detektFull -Pandroidx.baselineprofile.skipgeneration
.\gradlew.bat cleanTestAndroidHostTest testAndroidHostTest -Pandroidx.baselineprofile.skipgeneration
.\gradlew.bat :konsist:test -Pandroidx.baselineprofile.skipgeneration
.\gradlew.bat :sample:androidApp:assembleDebug -Pandroidx.baselineprofile.skipgeneration

All green.

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