[codex] integrate upstream shortest-path catalog and headless transport tests

[chsami]

Summary

• pin the Skretzo shortest-path collision map, league-region data, and transport catalogs with upstream provenance
• parse upstream transport requirements into Microbot's pathfinder and route supported transports through explicit walker execution intents
• expose transport-aware route steps and integrate the selected transport metadata with walker and banking planning
• add a deterministic headless harness that tests collision-map routing, transport eligibility, and execution intent without starting or logging in a RuneLite client
• document the integration decision, movement caveats, and offline testing workflow

Why

Microbot's web walker was missing transport and collision coverage available in the upstream shortest-path project. Transport behavior also depended heavily on logged-in runtime testing. This change imports a pinned, reviewable catalog and adds side-effect-free coverage for route selection and transport requirements.

Impact

The web walker can consider the expanded transport catalog while preserving Microbot-specific execution handlers and configuration. Developers can validate membership, skill, quest, varbit, item, equipment, currency, teleport, and transport-selection behavior offline. Live smoke tests are still required for scene objects, NPCs, widgets, dialogue, animation timing, and other dynamic game contracts.

Validation

• ./gradlew :client:compileJava
• shortest-path unit suite, including collision snapshot, catalog integration, route-step, execution-registry, and headless harness tests
• shortest-path benchmark
• Checkstyle
• focused offline harness: ./gradlew :client:runUnitTests --tests 'net.runelite.client.plugins.microbot.shortestpath.HeadlessTransportHarnessTest'

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