feat: add qdrant plugin

[saoudrizwan]

Qdrant

Adds a Qdrant plugin for vector search engineering work in Cline. The plugin focuses on guidance that helps users design, tune, operate, and migrate Qdrant-backed search systems without adding runtime services or install-time setup.

Cline Primitives

• Bundled skills for Qdrant SDK usage, deployment choices, scaling, performance optimization, monitoring, search quality, embedding model migration, and version upgrades.
• Linked reference docs under those skills for deeper topics such as tenant scaling, query latency, bulk indexing, hybrid search, relevance feedback, and monitoring setup. These are references rather than extra top-level skills so ordinary Qdrant prompts do not trigger a pile of overlapping skill entries.
• A safety rule that treats live Qdrant collection deletes, index changes, shard and replica changes, quantization changes, model migrations, upgrades, and cluster resizing as production database operations.

Requirements

• No API keys are required to install the plugin.
• No MCP server is registered.
• No Qdrant server is started.
• No SDK packages are installed automatically.
• External Qdrant docs are referenced for deeper follow-up, and the SDK skill asks before fetching current examples beyond the bundled guidance.

Trust Boundaries

The plugin is guidance-first. It should help Cline reason about Qdrant work, but any action that mutates live data, topology, search quality, cloud cost, or availability should be explicit and user-approved.

The bundled Qdrant skill material is Apache-2.0 licensed by Qdrant Solutions GmbH. The plugin includes the license and notice files with the adapted skill content.

[saoudrizwan]

Closing this plugin PR for now because this cleanup pass is limiting plugin marketplace PRs to plugins that only bundle MCP servers and/or skills. This PR includes additional plugin primitive(s): rules.

Those primitives may still be useful, but we are keeping this batch scoped to MCP and skill distribution.