Fix: slow app launch under the debugger

[wellingtoncosta]

The plugin installed a regex breakpoint (BreakpointCreateByRegex on ^_Konan_init_*) on the dummy target to discover loaded Kotlin modules. Regex breakpoints can't use LLDB's name-accelerator index, so resolving one forces LLDB to realize the full symbol table of every module as it loads. An iOS app dlopens hundreds of frameworks at launch, so this ran on every debug session for every app — even ones with no Kotlin — roughly doubling launch time.

Replace it with lazy, stop-time discovery:

• Scan loaded modules on stop, gating cheapest-first: skip system paths (no symtab touch), exact-name probe for the Kotlin runtime marker, and only deep-scan real Kotlin modules. ~99% of modules are eliminated by path alone.
• Retry the ObjC base-class prefix read on later stops (the class_ro_t name pointer isn't rebased on the earliest stop), capped, with module-name formatters registered immediately.
• Short-circuit steady-state stops to a single integer compare; retry window stays O(pending), not O(all modules).

Measured on WordPress app (41 frameworks), launch->UIApplicationMain, median of 5 interleaved runs: baseline 3.15s, old plugin 8.48s (2.70x), new plugin 3.11s (~baseline).