feat: implement --with/--without selective install flags (#679)

Add agent: and skill: component families to the install component
catalog, enabling fine-grained selective install via CLI flags:

  ecc install --profile developer --with lang:typescript --without capability:orchestration
  ecc install --with lang:python --with agent:security-reviewer

Changes:
- Add agent: family (9 entries) and skill: family (10 entries) to
  manifests/install-components.json for granular component addressing
- Update install-components.schema.json to accept agent: and skill:
  family prefixes
- Register agent and skill family prefixes in COMPONENT_FAMILY_PREFIXES
  (scripts/lib/install-manifests.js)
- Add 41 comprehensive tests covering CLI parsing, request normalization,
  component catalog validation, plan resolution, target filtering,
  error handling, and end-to-end install with --with/--without flags

Closes #470

manifests/install-components.json

@@ -250,6 +250,158 @@
       "modules": [
         "document-processing"
       ]
+    },
+    {
+      "id": "agent:architect",
+      "family": "agent",
+      "description": "System design and architecture agent.",
+      "modules": [
+        "agents-core"
+      ]
+    },
+    {
+      "id": "agent:code-reviewer",
+      "family": "agent",
+      "description": "Code review agent for quality and security checks.",
+      "modules": [
+        "agents-core"
+      ]
+    },
+    {
+      "id": "agent:security-reviewer",
+      "family": "agent",
+      "description": "Security vulnerability analysis agent.",
+      "modules": [
+        "agents-core"
+      ]
+    },
+    {
+      "id": "agent:tdd-guide",
+      "family": "agent",
+      "description": "Test-driven development guidance agent.",
+      "modules": [
+        "agents-core"
+      ]
+    },
+    {
+      "id": "agent:planner",
+      "family": "agent",
+      "description": "Feature implementation planning agent.",
+      "modules": [
+        "agents-core"
+      ]
+    },
+    {
+      "id": "agent:build-error-resolver",
+      "family": "agent",
+      "description": "Build error resolution agent.",
+      "modules": [
+        "agents-core"
+      ]
+    },
+    {
+      "id": "agent:e2e-runner",
+      "family": "agent",
+      "description": "Playwright E2E testing agent.",
+      "modules": [
+        "agents-core"
+      ]
+    },
+    {
+      "id": "agent:refactor-cleaner",
+      "family": "agent",
+      "description": "Dead code cleanup and refactoring agent.",
+      "modules": [
+        "agents-core"
+      ]
+    },
+    {
+      "id": "agent:doc-updater",
+      "family": "agent",
+      "description": "Documentation update agent.",
+      "modules": [
+        "agents-core"
+      ]
+    },
+    {
+      "id": "skill:tdd-workflow",
+      "family": "skill",
+      "description": "Test-driven development workflow skill.",
+      "modules": [
+        "workflow-quality"
+      ]
+    },
+    {
+      "id": "skill:continuous-learning",
+      "family": "skill",
+      "description": "Session pattern extraction and continuous learning skill.",
+      "modules": [
+        "workflow-quality"
+      ]
+    },
+    {
+      "id": "skill:eval-harness",
+      "family": "skill",
+      "description": "Evaluation harness for AI regression testing.",
+      "modules": [
+        "workflow-quality"
+      ]
+    },
+    {
+      "id": "skill:verification-loop",
+      "family": "skill",
+      "description": "Verification loop for code quality assurance.",
+      "modules": [
+        "workflow-quality"
+      ]
+    },
+    {
+      "id": "skill:strategic-compact",
+      "family": "skill",
+      "description": "Strategic context compaction for long sessions.",
+      "modules": [
+        "workflow-quality"
+      ]
+    },
+    {
+      "id": "skill:coding-standards",
+      "family": "skill",
+      "description": "Language-agnostic coding standards and best practices.",
+      "modules": [
+        "framework-language"
+      ]
+    },
+    {
+      "id": "skill:frontend-patterns",
+      "family": "skill",
+      "description": "React and frontend engineering patterns.",
+      "modules": [
+        "framework-language"
+      ]
+    },
+    {
+      "id": "skill:backend-patterns",
+      "family": "skill",
+      "description": "API design, database, and backend engineering patterns.",
+      "modules": [
+        "framework-language"
+      ]
+    },
+    {
+      "id": "skill:security-review",
+      "family": "skill",
+      "description": "Security review checklist and vulnerability analysis.",
+      "modules": [
+        "security"
+      ]
+    },
+    {
+      "id": "skill:deep-research",
+      "family": "skill",
+      "description": "Deep research and investigation workflows.",
+      "modules": [
+        "research-apis"
+      ]
     }
   ]
 }