feat: Initialize firefrost-services monorepo structure

WHAT WAS DONE:
- Created npm workspaces configuration in root package.json
- Set up directory structure (services/, shared/, future/)
- Created @firefrost/shared package (v1.0.0)
- Added comprehensive .gitignore for Node.js projects
- Created root README with architecture documentation
- Added placeholder READMEs for shared/ and future/ directories

WHY:
- Implement Gemini-approved monorepo architecture
- Enable service-prefixed Git tag versioning
- Support npm workspaces for dependency management
- Provide foundation for Arbiter 2.1 deployment
- Align with 'decades not months' sustainability philosophy

STRUCTURE:
Root level:
- package.json (workspaces: services/*, shared)
- .gitignore (protects .env files from commits)
- README.md (comprehensive documentation)

Directories:
- services/ (production services - empty, ready for Arbiter)
- shared/ (@firefrost/shared v1.0.0 - placeholder)
- future/ (experimental services)

FILES:
- .gitignore (new, 39 lines)
- README.md (new, 242 lines)
- package.json (new, 27 lines)
- shared/package.json (new, 17 lines)
- shared/README.md (new, 47 lines)
- shared/src/index.js (new, 13 lines)
- future/README.md (new, 38 lines)

NEXT STEPS:
- Migrate Arbiter 2.1 code to services/arbiter/
- Create arbiter-v2.1.0 tag for first versioned deployment
- Test deployment workflow and systemd configuration

Signed-off-by: The Golden Chronicler <claude@firefrostgaming.com>

package.json

@@ -0,0 +1,26 @@
+{
+  "name": "firefrost-services",
+  "version": "1.0.0",
+  "description": "Monorepo for Firefrost Gaming backend services",
+  "private": true,
+  "workspaces": [
+    "services/*",
+    "shared"
+  ],
+  "scripts": {
+    "install-all": "npm install"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://git.firefrostgaming.com/firefrost-gaming/firefrost-services.git"
+  },
+  "keywords": [
+    "firefrost",
+    "gaming",
+    "discord",
+    "automation",
+    "minecraft"
+  ],
+  "author": "Firefrost Gaming (The Trinity + The Chronicler)",
+  "license": "UNLICENSED"
+}