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

rustfmt.toml

@@ -0,0 +1,24 @@
+binop_separator = "Back"
+brace_style = "PreferSameLine"
+control_brace_style = "AlwaysSameLine"
+comment_width = 80
+edition = "2021"
+enum_discrim_align_threshold = 40
+fn_params_layout = "Tall"
+fn_single_line = false
+force_explicit_abi = true
+force_multiline_blocks = false
+format_code_in_doc_comments = true
+format_macro_matchers = true
+format_macro_bodies = true
+hex_literal_case = "Lower"
+imports_indent = "Block"
+imports_layout = "Vertical"
+match_arm_leading_pipes = "Always"
+match_block_trailing_comma = true
+imports_granularity = "Crate"
+normalize_doc_attributes = true
+reorder_impl_items = true
+reorder_imports = true
+group_imports = "StdExternalCrate"
+wrap_comments = true