feat: Implement RFC-0004 and add RFC-0007 through RFC-0012

RFC Implementations:
- RFC-0004: Tiered Interface Primers - IMPLEMENTED
  - Simplified primer system with budget-aware tier selection
  - Three tiers: minimal (<80), standard (80-299), full (300+)
  - Bootstrap block always included (~20 tokens)

RFC Updates:
- RFC-0006: Documentation System Bridging - status updated
- RFC-0001, RFC-0003, RFC-0005: Minor updates and fixes

New Draft RFCs:
- RFC-0007: ACP Complete Documentation Solution (Umbrella)
- RFC-0008: ACP Type Annotations
- RFC-0009: Extended Annotation Types
- RFC-0010: ACP Documentation Generator
- RFC-0011: IDE and LSP Integration
- RFC-0012: Built-in Templates and Theming

Specification Updates:
- Chapter 03: Cache format with bridging support
- Chapter 04: Config format with bridge configuration
- Chapter 05: Extended annotations documentation
- Chapter 06: Updated constraints
- Chapter 11: Tool integration updates
- Chapter 15: New bridging chapter

Schema Updates:
- cache.schema.json: Bridge metadata, type sources, extended fields
- config.schema.json: Bridge configuration section

Infrastructure:
- Migrated .claude/commands to managed skills
- Added RFC memory files for tracking implementation progress
- Cleaned up deprecated scripts and templates

Author: ddunnock

.acp.config.json

@@ -0,0 +1,24 @@
+{
+  "$schema": "https://acp-protocol.dev/schemas/v1/config.schema.json",
+  "version": "1.0.0",
+  "include": [
+    "**/*.js",
+    "**/*.jsx",
+    "**/*.mjs",
+    "**/*.rs",
+    "**/*.py",
+    "**/*.ts",
+    "**/*.tsx",
+    "**/*.go",
+    "**/*.java"
+  ],
+  "exclude": [
+    "**/node_modules/**",
+    "**/dist/**",
+    "**/build/**",
+    "**/target/**",
+    "**/.git/**",
+    "**/vendor/**",
+    "**/__pycache__/**"
+  ]
+}