refactor!: port shell scripts to Python package

Bash scripts were untestable and duplicated device/LUKS/mount logic;
the lim/ package centralizes it behind one subprocess wrapper and a
YAML image catalog (single point of truth).

BREAKING CHANGE: scripts/*.sh removed. Use `lim --type <cmd>`; new
types mount/umount/single-boot/raid1-boot/lock/unlock/import/export
replace direct script calls. --extra is deprecated and ignored.

- distributions.yml + lim/catalog.py hold the image catalog (PyYAML)
- pytest suite: 102 tests with mocked subprocess (tests/unit) and a
  250-line max file-length guard (tests/lint)
- ruff strict (select ALL), GitHub Actions CI, Dependabot; Travis gone
- Makefile: install (symlink ~/.local/bin/lim) and test targets
- fixes over bash: SUDO_USER-aware chown, mmcblk/nvme partition paths,
  sha512 checksum support, whole-pipeline failure detection, blkid
  UUID fallback for pre-mounted images, conditional fstab seeding for
  PARTUUID/LABEL images, clean errors for missing binaries

lim/storage/raid1.py

@@ -0,0 +1,68 @@
+"""Encrypted Btrfs RAID1 across two drives.
+
+See https://balaskas.gr/btrfs/raid1.html and
+https://mutschler.eu/linux/install-guides/ubuntu-btrfs-raid1/
+"""
+
+from lim import luks, runner, ui
+from lim.storage.common import StorageTarget, select_storage_target
+
+
+def _select_pair() -> tuple[StorageTarget, StorageTarget]:
+    ui.info("RAID1 partition 1...")
+    first = select_storage_target()
+    ui.info("RAID1 partition 2...")
+    second = select_storage_target()
+    return first, second
+
+
+def setup() -> None:
+    first, second = _select_pair()
+
+    ui.info(f"Encrypting {first.device.path}...")
+    runner.run(["cryptsetup", "luksFormat", first.device.path], sudo=True)
+    ui.info(f"Encrypting {second.device.path}...")
+    runner.run(["cryptsetup", "luksFormat", second.device.path], sudo=True)
+
+    runner.run(["cryptsetup", "luksOpen", first.device.path, first.mapper_name], sudo=True)
+    runner.run(
+        ["cryptsetup", "luksOpen", second.device.path, second.mapper_name], sudo=True
+    )
+    runner.run(["cryptsetup", "status", first.mapper_path], sudo=True)
+    runner.run(["cryptsetup", "status", second.mapper_path], sudo=True)
+
+    runner.run(
+        [
+            "mkfs.btrfs",
+            "-m",
+            "raid1",
+            "-d",
+            "raid1",
+            first.mapper_path,
+            second.mapper_path,
+        ],
+        sudo=True,
+    )
+
+    ui.success("Encryption successfull :)")
+
+
+def _show_luks_devices() -> None:
+    for name in runner.output(["lsblk", "-dno", "NAME"], check=False).split():
+        if runner.succeeds(["cryptsetup", "isLuks", f"/dev/{name}"], sudo=True):
+            ui.info(f"/dev/{name} is a LUKS encrypted storage device.")
+
+
+def mount_on_boot() -> None:
+    ui.info("Activate Automount raid1 encrypted storages...")
+    _show_luks_devices()
+
+    first, second = _select_pair()
+
+    luks.create_luks_key_and_update_crypttab(first.mapper_name, first.device.path)
+    ui.info(f'Creating mount folder under "{first.mount_path}"...')
+    runner.run(["mkdir", "-vp", first.mount_path], sudo=True)
+    luks.create_luks_key_and_update_crypttab(second.mapper_name, second.device.path)
+    luks.update_fstab(first.mapper_path, first.mount_path)
+
+    ui.success("Installation finished. Please restart :)")