feat: Bolt Card writer CLI for PC/SC NFC readers

Provision, inspect and wipe NTAG 424 DNA Bolt Cards from a Linux PC
using an LNbits /boltcards/api/v1/auth link, replacing the phone app
for desks with a USB reader (ACR1252U).

- pcsc.py: ctypes client for libpcsclite (no compiled deps)
- ntag424.py: EV2 secure messaging (AuthenticateEV2First, ChangeKey,
  ChangeFileSettings, GetCardUID, WriteData) per NT4H2421Gx / AN12196
- boltcard.py: the same write/wipe sequence as bolt-card-programmer
  (NDEF URL, SDM 40 00E0 C1 FF12, keys 1-4 then 0, key version 1)
  plus local p/c verification identical to the extension's nxp424.py
- cli.py: readers / read / write / wipe, keys backed up before any
  card mutation, uid cross-check on wipe

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

pyproject.toml

@@ -0,0 +1,40 @@
+[project]
+name = "boltcard-writer"
+version = "0.1.0"
+description = "Write, verify and wipe Bolt Cards (NTAG 424 DNA) from a Linux PC with a USB NFC reader, straight from an LNbits auth link"
+readme = "README.md"
+license = "MIT"
+requires-python = ">=3.11"
+dependencies = [
+    "click>=8.1",
+    "cryptography>=42",
+]
+
+[project.scripts]
+boltcard-writer = "boltcard_writer.cli:main"
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/boltcard_writer"]
+
+[dependency-groups]
+dev = [
+    "pytest>=8",
+    "ruff>=0.5",
+]
+
+[tool.ruff]
+line-length = 140
+target-version = "py311"
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "B", "UP"]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+
+[tool.ruff.lint.per-file-ignores]
+"tests/*" = ["E501"]