feat(llm-security-copilot): port llm-security v5.1.0 to GitHub Copilot CLI

Full port of llm-security plugin for internal use on Windows with GitHub
Copilot CLI. Protocol translation layer (copilot-hook-runner.mjs)
normalizes Copilot camelCase I/O to Claude Code snake_case format — all
original hook scripts run unmodified.

- 8 hooks with protocol translation (stdin/stdout/exit code)
- 18 SKILL.md skills (Agent Skills Open Standard)
- 6 .agent.md agent definitions
- 20 scanners + 14 scanner lib modules (unchanged)
- 14 knowledge files (unchanged)
- 39 test files including copilot-port-verify.mjs (17 tests)
- Windows-ready: node:path, os.tmpdir(), process.execPath, no bash

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

plugins/llm-security-copilot/tests/fixtures/memory-scan/clean-project/.claude/rules/coding-style.md

@@ -0,0 +1,5 @@
+# Coding Style Rules
+
+- Prefer const over let
+- Use async/await over callbacks
+- Maximum line length: 100 characters

plugins/llm-security-copilot/tests/fixtures/memory-scan/clean-project/CLAUDE.md

@@ -0,0 +1,20 @@
+# My Project
+
+## Build
+
+```bash
+npm install
+npm test
+```
+
+## Code Style
+
+- Use TypeScript for all source files
+- Run `eslint` before committing
+- Conventional Commits: `type(scope): description`
+
+## Architecture
+
+- `src/` — main source code
+- `tests/` — test files
+- `docs/` — documentation

plugins/llm-security-copilot/tests/fixtures/memory-scan/clean-project/memory/session.md

@@ -0,0 +1,9 @@
+---
+name: session-state
+description: Current session progress
+type: project
+---
+
+Working on feature X. Branch: feature/add-search.
+Last commit: abc1234 — added search endpoint.
+Tests passing: 42/42.