Initial commit: docs, decisions, and M1 sensor core

Planning docs (SPEC, ARCHITECTURE, MODULES, ROADMAP, DECISIONS) with
decisions D1-D15 settled: RigDoctor name, Python 3 + Qt/PySide6 stack
(core/CLI/daemon stdlib-only), Ubuntu + NVIDIA first, .deb packaging,
read-only + suggestions, GUI + tray modules, stress module dropped.

First code: the M1 sensor core (stdlib-only) and a CLI.
- core engine: Reading/Sample model, Sampler, hwmon reader
- self-probing sources (NVIDIA first): nvidia-smi GPU, coretemp/k10temp
  CPU, /proc/meminfo + DDR5 SPD memory, NVMe storage
- CLI: snapshot (text/JSON), monitor, sources; record/report stubbed
- stdlib unittest smoke tests

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

pyproject.toml

@@ -0,0 +1,22 @@
+[build-system]
+requires = ["setuptools>=61"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "rigdoctor"
+version = "0.1.0"
+description = "Modular hardware monitoring & crash diagnostics for Linux gamers."
+readme = "README.md"
+requires-python = ">=3.11"
+# Core/CLI/daemon are stdlib-only by design (D2). The GUI/tray modules will add
+# PySide6 via an optional extra when those land.
+dependencies = []
+
+[project.optional-dependencies]
+gui = ["PySide6"]
+
+[project.scripts]
+rigdoctor = "rigdoctor.cli:main"
+
+[tool.setuptools.packages.find]
+where = ["src"]