完成一个简易的全局skill、command管理器

manager/testdata/fixtures/test-repo/commands/test-cmd/init.md

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+# Init Command
+
+Test command for initialization.
+
+## Usage
+
+```
+/test-cmd:init
+```

manager/testdata/fixtures/test-repo/commands/test-cmd/run.md

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+# Run Command
+
+Test command for running.
+
+## Usage
+
+```
+/test-cmd:run
+```

manager/testdata/fixtures/test-repo/skills/test-skill-2/SKILL.md

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+# Test Skill 2
+
+Second test skill for testing multiple skills.
+
+## Description
+
+Another test skill fixture.

manager/testdata/fixtures/test-repo/skills/test-skill/SKILL.md

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+# Test Skill
+
+This is a test skill for unit and integration tests.
+
+## Description
+
+A simple skill that does nothing but serves as a test fixture.