feat: v3.0.0 architecture overhaul

- Rename marketplace to lm-claude-plugins
- Move MCP servers to root with symlinks
- Add 6 PR tools to Gitea MCP (list_pull_requests, get_pull_request,
  get_pr_diff, get_pr_comments, create_pr_review, add_pr_comment)
- Add clarity-assist plugin (prompt optimization with ND accommodations)
- Add git-flow plugin (workflow automation)
- Add pr-review plugin (multi-agent review with confidence scoring)
- Centralize configuration docs
- Update all documentation for v3.0.0

BREAKING CHANGE: MCP server paths changed, marketplace renamed

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/pr-review/commands/pr-findings.md

@@ -0,0 +1,137 @@
+# /pr-findings - Filter Review Findings
+
+## Purpose
+
+List and filter findings from a previous PR review by category, severity, or confidence level.
+
+## Usage
+
+```
+/pr-findings <pr-number> [filters]
+```
+
+### Filters
+
+```
+--category <cat>      Filter by category (security, performance, maintainability, tests)
+--severity <sev>      Filter by severity (critical, major, minor, suggestion)
+--confidence <min>    Minimum confidence score (0.0-1.0)
+--file <pattern>      Filter by file path pattern
+```
+
+## Examples
+
+```
+# Show only security findings
+/pr-findings 123 --category security
+
+# Show critical and major issues only
+/pr-findings 123 --severity critical,major
+
+# Show high-confidence findings only
+/pr-findings 123 --confidence 0.8
+
+# Show findings in specific files
+/pr-findings 123 --file src/api/*
+```
+
+## Behavior
+
+### Without Previous Review
+
+If no review exists for this PR:
+
+```
+No review found for PR #123.
+
+Would you like to:
+1. Run full /pr-review now
+2. Run quick /pr-summary
+3. Cancel
+```
+
+### With Previous Review
+
+Display filtered findings:
+
+```
+═══════════════════════════════════════════════════
+PR #123 Findings (filtered: security)
+═══════════════════════════════════════════════════
+
+Showing 3 of 8 total findings
+
+───────────────────────────────────────────────────
+
+[SEC-001] SQL Injection Vulnerability
+Confidence: 0.95 (HIGH) | Severity: Critical
+File: src/api/users.ts:45
+
+The query uses string interpolation without parameterization.
+
+Fix: Use parameterized queries.
+
+───────────────────────────────────────────────────
+
+[SEC-002] Missing Input Validation
+Confidence: 0.88 (MEDIUM) | Severity: Major
+File: src/api/auth.ts:23
+
+User input is passed directly to database without validation.
+
+Fix: Add input validation middleware.
+
+───────────────────────────────────────────────────
+
+[SEC-003] Sensitive Data in Logs
+Confidence: 0.72 (MEDIUM) | Severity: Minor
+File: src/utils/logger.ts:15
+
+Password field may be logged in debug mode.
+
+Fix: Sanitize sensitive fields before logging.
+
+═══════════════════════════════════════════════════
+```
+
+## Output Formats
+
+### Default (Detailed)
+
+Full finding details with descriptions and fixes.
+
+### Compact (--compact)
+
+```
+SEC-001 | Critical | 0.95 | src/api/users.ts:45 | SQL Injection
+SEC-002 | Major    | 0.88 | src/api/auth.ts:23  | Missing Validation
+SEC-003 | Minor    | 0.72 | src/utils/logger.ts | Sensitive Logs
+```
+
+### JSON (--json)
+
+```json
+{
+  "pr": 123,
+  "findings": [
+    {
+      "id": "SEC-001",
+      "category": "security",
+      "severity": "critical",
+      "confidence": 0.95,
+      "file": "src/api/users.ts",
+      "line": 45,
+      "title": "SQL Injection Vulnerability",
+      "description": "...",
+      "fix": "..."
+    }
+  ]
+}
+```
+
+## Use Cases
+
+- Focus on specific issue types
+- Track resolution of findings
+- Export findings for tracking
+- Quick reference during fixes