Add Cursor CLI as target provider (#179)

* feat(cursor): add Cursor CLI as target provider

Add converter, writer, types, and tests for converting Claude Code
plugins to Cursor-compatible format (.mdc rules, commands, skills,
mcp.json). Agents become Agent Requested rules (alwaysApply: false),
commands are plain markdown, skills copy directly, MCP is 1:1 JSON.

* docs: add Cursor spec and update README with cursor target

* chore: bump CLI version to 0.5.0 for cursor target

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* docs: note Cursor IDE + CLI compatibility in README

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

src/targets/index.ts

@@ -2,12 +2,15 @@ import type { ClaudePlugin } from "../types/claude"
 import type { OpenCodeBundle } from "../types/opencode"
 import type { CodexBundle } from "../types/codex"
 import type { DroidBundle } from "../types/droid"
+import type { CursorBundle } from "../types/cursor"
 import { convertClaudeToOpenCode, type ClaudeToOpenCodeOptions } from "../converters/claude-to-opencode"
 import { convertClaudeToCodex } from "../converters/claude-to-codex"
 import { convertClaudeToDroid } from "../converters/claude-to-droid"
+import { convertClaudeToCursor } from "../converters/claude-to-cursor"
 import { writeOpenCodeBundle } from "./opencode"
 import { writeCodexBundle } from "./codex"
 import { writeDroidBundle } from "./droid"
+import { writeCursorBundle } from "./cursor"
 
 export type TargetHandler<TBundle = unknown> = {
   name: string
@@ -35,4 +38,10 @@ export const targets: Record<string, TargetHandler> = {
     convert: convertClaudeToDroid as TargetHandler<DroidBundle>["convert"],
     write: writeDroidBundle as TargetHandler<DroidBundle>["write"],
   },
+  cursor: {
+    name: "cursor",
+    implemented: true,
+    convert: convertClaudeToCursor as TargetHandler<CursorBundle>["convert"],
+    write: writeCursorBundle as TargetHandler<CursorBundle>["write"],
+  },
 }