docs: comprehensive documentation overhaul for v2.2.3

Major documentation update bringing all docs current with the 122-tool,
16-category state of the project (previously frozen at v2.1.0-alpha/59 tools).

New documentation (9 files):
- FREEROUTING_GUIDE.md - autorouter setup, Docker/Podman, all 4 tools
- SCHEMATIC_TOOLS_REFERENCE.md - all 27 schematic tools with parameters
- ROUTING_TOOLS_REFERENCE.md - all 13 routing tools with examples
- FOOTPRINT_SYMBOL_CREATOR_GUIDE.md - 8 creator tools with examples
- SVG_IMPORT_GUIDE.md - SVG logo import tool
- DATASHEET_TOOLS_GUIDE.md - datasheet enrichment tools
- PCB_DESIGN_WORKFLOW.md - end-to-end design guide
- ARCHITECTURE.md - system architecture for contributors
- INDEX.md - documentation table of contents

Updated documentation (12 files):
- README.md - tool count 64->122, feature list, contributor credits
- TOOL_INVENTORY.md - complete rebuild with all 122 tools
- STATUS_SUMMARY.md - updated to v2.2.3 feature matrix
- ROADMAP.md - marked completed milestones, added v2.3+ vision
- KNOWN_ISSUES.md - removed resolved issues, added v2.2.x fixes
- CLIENT_CONFIGURATION.md - added KICAD_MCP_DEV, FREEROUTING_JAR env vars
- LIBRARY_INTEGRATION.md - added symbol and project-local library support
- ROUTER_ARCHITECTURE.md, ROUTER_QUICK_START.md - updated tool counts
- IPC_BACKEND_STATUS.md - updated dates
- JLCPCB_USAGE_GUIDE.md - added cross-reference note
- CONTRIBUTING.md - added ARCHITECTURE.md reference, updated tool count

Archived 10 completed planning docs to docs/archive/.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docs/ROUTER_ARCHITECTURE.md

@@ -2,7 +2,7 @@
 
 ## Overview
 
-This document describes the router pattern implementation for the KiCAD MCP Server. The router reduces context window consumption from ~40K tokens (59 tools) to ~12K tokens (16 visible tools).
+This document describes the router pattern implementation for the KiCAD MCP Server. The router reduces context window consumption by organizing 122+ tools into 8 discoverable categories, keeping only the most frequently used tools directly visible.
 
 ## Architecture Layers
 
@@ -29,14 +29,14 @@ This document describes the router pattern implementation for the KiCAD MCP Serv
 │                              │                               │
 │                              ▼                               │
 │  ┌─────────────────────────────────────────────────────────┐│
-│  │            ROUTED TOOLS (Hidden - 47)                   ││
+│  │            ROUTED TOOLS (Hidden - 110+)                 ││
 │  │  ┌──────────┐ ┌──────────┐ ┌──────────┐ ┌──────────┐   ││
 │  │  │  board   │ │component │ │  export  │ │   drc    │   ││
-│  │  │(9 tools) │ │(8 tools) │ │(8 tools) │ │(9 tools) │   ││
+│  │  │   tools  │ │  tools   │ │  tools   │ │  tools   │   ││
 │  │  └──────────┘ └──────────┘ └──────────┘ └──────────┘   ││
-│  │  ┌──────────┐ ┌──────────┐ ┌──────────┐                ││
-│  │  │schematic │ │ library  │ │ routing  │ ┌──────────┐   ││
-│  │  │(9 tools) │ │(4 tools) │ │(3 tools) │ │ui (1 tool)│   ││
+│  │  ┌──────────┐ ┌──────────┐ ┌──────────┐ ┌──────────┐   ││
+│  │  │schematic │ │ library  │ │ routing  │ │footprint │   ││
+│  │  │  tools   │ │  tools   │ │  tools   │ │  tools   │   ││
 │  │  └──────────┘ └──────────┘ └──────────┘ └──────────┘   ││
 │  └─────────────────────────────────────────────────────────┘│
 └─────────────────────────────────────────────────────────────┘
@@ -68,7 +68,7 @@ These cover the primary workflow (80%+ of use cases):
 4. **UI Management** (1):
    - `check_kicad_ui` - Check if KiCAD UI is running
 
-### Routed Categories (7 categories, 47 tools)
+### Routed Categories (8+ categories, 110+ tools)
 
 #### 1. `board` - Board Configuration & Layout (9 tools)
 Setup and configuration operations.