Add Risk-aware Planner community plugin (v0.1.0)

[abdohamdy7]

Summary

Register p20_risk_aware_planner as a LocalPlanningStrategy, pinned to v0.1.0. This changes only plugins.yaml.

• Source: https://github.com/abdohamdy7/risk-aware-planner-avlite-plugins
• Release: https://github.com/abdohamdy7/risk-aware-planner-avlite-plugins/releases/tag/v0.1.0
• MIT license; no ROS requirement.
• Installation/profile steps: README.md and PUBLICATION.md in the source repository.
• Verification: https://github.com/abdohamdy7/risk-aware-planner-avlite-plugins/blob/v0.1.0/VERIFICATION.md

The plugin builds a fixed source-to-goal state lattice, performs rolling risk-constrained shortest-path search while preserving the committed edge remainder, and optionally smooths the new suffix with OSQP. Existing controllers and world bridges are unchanged. Enhanced visualization and demo launchers are separate companions. Motion and smoothing default to disabled.

Verification and compatibility

• Fresh Python 3.10 environment with PyPI AVLite 0.5.3: 144 tests passed, including native BasicSim closed loops and obstacle/smoothing scenarios.
• AVLite 0.6.4: 139 passed, 5 failed in the separate companion demo/preview integration (MapReader registration and the newer _perception_step(sensors) interface). No planner-only test failed. Full companion-demo support is claimed only for 0.5.3; limitations are documented in the release and dependency notes.
• Registry validator passed with zero warnings.
• Public repository, README, MIT LICENSE and v0.1.0 tag are present.

Research/demo risk scores are not calibrated probabilities; physical vehicle motion is not validated. Please review the listing and compatibility scope. No AVLite-core changes are requested.