feat: implement storybook DSL with template composition and validation

Add complete domain-specific language for authoring narrative content for
agent simulations.

Features:
- Complete parser using LALRPOP + logos lexer
- Template composition (includes + multiple inheritance)
- Strict mode validation for templates
- Reserved keyword protection
- Semantic validators (trait ranges, schedule overlaps, life arcs, behaviors)
- Name resolution and cross-reference tracking
- CLI tool (validate, inspect, query commands)
- Query API with filtering
- 260 comprehensive tests (unit, integration, property-based)

Implementation phases:
- Phase 1 (Parser): Complete
- Phase 2 (Resolution + Validation): Complete
- Phase 3 (Public API + CLI): Complete

BREAKING CHANGE: Initial implementation

Cargo.toml

@@ -0,0 +1,36 @@
+[package]
+name = "storybook"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+name = "storybook"
+path = "src/lib.rs"
+
+[[bin]]
+name = "sb"
+path = "src/bin/sb.rs"
+
+[dependencies]
+logos = "0.14"
+lalrpop-util = "0.21"
+miette = { version = "7.0", features = ["fancy"] }
+thiserror = "1.0"
+strsim = "0.11"      # Fuzzy matching for "did you mean?" suggestions
+indexmap = "2.0"     # Order-preserving maps
+petgraph = "0.6"     # Cycle detection
+# Phase 3: Public API + CLI
+anyhow = "1.0"       # Error handling
+clap = { version = "4.5", features = ["derive"] }
+notify = "6.0"       # Filesystem watching
+toml = "0.8"         # storybook.toml parsing
+walkdir = "2.4"      # Directory traversal
+serde = { version = "1.0", features = ["derive"] }
+
+[build-dependencies]
+lalrpop = "0.21"
+
+[dev-dependencies]
+proptest = "1.4"
+insta = "1.34"
+tempfile = "3.8"  # Temporary directories for integration tests