Phase 0: project skeleton

- pyproject.toml with uv, deps for runtime + gui + backtest + dev
- ruff/mypy strict config, pre-commit hooks for ruff/mypy/pytest
- src/cerbero_bite/ layout with empty modules ready for Phase 1+
- structlog JSONL logger with daily rotation
- click CLI with placeholder subcommands (status, start, kill-switch,
  gui, replay, config hash, audit verify)
- 6 smoke tests passing, mypy --strict clean, ruff clean

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.pre-commit-config.yaml

@@ -0,0 +1,43 @@
+repos:
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.7.4
+    hooks:
+      - id: ruff
+        args: [--fix]
+      - id: ruff-format
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v5.0.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+        args: ["--maxkb=500"]
+      - id: check-merge-conflict
+      - id: detect-private-key
+
+  - repo: local
+    hooks:
+      - id: mypy
+        name: mypy --strict
+        entry: uv run mypy --strict src/cerbero_bite
+        language: system
+        types: [python]
+        pass_filenames: false
+
+      - id: pytest-fast
+        name: pytest unit
+        entry: uv run pytest tests/unit -x -q
+        language: system
+        types: [python]
+        pass_filenames: false
+        stages: [pre-commit]
+
+      - id: pytest-golden
+        name: pytest golden
+        entry: uv run pytest tests/golden tests/integration -x -q
+        language: system
+        types: [python]
+        pass_filenames: false
+        stages: [pre-push]