feat: remove installed files and list backups

--remove deletes for good, or moves into a backup with --backup, only what the install record proves the installer placed: unchanged bytes, a regular file below the BIOS folder reached through no link, a SHA-1 the list still serves. Shared, changed, hand-added and unservable files stay and are named. --backups lists, --delete-backup deletes, --restore now updates the record. The full screen gains More, Remove files, the removal plan, Backups and their confirms. Events removal_plan, removed, restored and backup.

scripts/generate_event_schema.py

@@ -37,18 +37,21 @@ KEY_TYPES: dict[str, dict] = {
     **dict.fromkeys((
         "installer", "os", "os_name", "stage", "reason", "platform", "message",
         "folder", "dest", "system", "name", "bios_dir", "path", "member",
-        "list_version", "installed_version", "board", "core", "date",
+        "list_version", "installed_version", "board", "core", "date", "moved_to",
     ), _TEXT),
-    "mode": {"enum": ["install", "check", "dry-run", "list"]},
+    "mode": {"enum": ["install", "check", "dry-run", "list", "remove", "restore"]},
+    "source": {"enum": ["remove", "install"]},
     "state": {"enum": ["present", "wrong_hash", "missing"]},
-    "status": {"enum": ["applied", "written", "unreadable", "not_written"]},
+    "status": {"enum": ["applied", "written", "unreadable", "not_written", "listed", "made",
+                        "deleted", "not_deleted"]},
     **dict.fromkeys((
         "files", "files_done", "files_total", "bytes", "bytes_done", "bytes_total",
         "bytes_local", "bytes_network", "size", "present", "missing", "wrong_hash",
         "bytes_needed", "data_missing", "not_installable", "installed", "up_to_date",
-        "pending", "code", "games", "recognised", "not_games",
+        "pending", "code", "games", "recognised", "not_games", "gone",
     ), _COUNT),
-    **dict.fromkeys(("truncated", "ok", "interrupted", "required_only", "applied", "info"), _FLAG),
+    **dict.fromkeys(("truncated", "ok", "interrupted", "required_only", "applied", "info",
+                     "backup"), _FLAG),
     **dict.fromkeys(("systems", "other_drives", "dests", "written", "choice"), _NAMES),
     **dict.fromkeys(("platforms", "failed", "skipped", "left_out", "kept", "found",
                      "fallback"), _RECORDS),