feat(block1): inventory walking skeleton + first quick-add slice

Stand up the Tanemaki monorepo and the first end-to-end vertical slice of
Block 1 (offline, encrypted inventory): add a seed → see it in a categorized,
searchable list → it persists → reopen and it's still there.

Architecture (state management like G1nkgo, adapted to Tane's reality):
- flutter_bloc (Cubit-first), but the encrypted Drift DB is the single source
  of truth; cubits stream from repositories (no hydrated_bloc/Hive, which would
  write plaintext at rest).
- get_it composition root; go_router; slang i18n (ES/EN, Weblate-friendly JSON).

Workspace & core:
- pub workspace: packages/commons_core (pure Dart) + apps/app_seeds (Flutter).
- commons_core primitives: UUIDv7 IdGen, Hybrid Logical Clock, Quantity value
  type (+ plant-aware QuantityKind), IdentityService root-seed stub.

Data & security:
- Drift schemaVersion=1 with all 10 Block-1 tables + common CRDT columns
  (HLC updated_at, last_author, tombstones); Movement append-only.
- SQLCipher via an injectable executor that refuses to open a plaintext DB;
  DB key + root seed in the OS keystore (separate secrets).
- Exported drift_schema_v1.json + migration scaffold.

Tests (near-TDD; nothing merges without tests):
- commons_core units (24), Drift migration test, "no plaintext at rest"
  security guard (runs where SQLCipher is present, skips otherwise),
  repository, widget, full quick-add flow, file-reopen persistence, and a
  no-hardcoded-strings i18n guard. GitLab CI: format + analyze + test + coverage.

Follow-on Block-1 stories (item detail/edit, species catalog, germination UI)
and all of Block 2 remain out of scope.

apps/app_seeds/lib/i18n/es.i18n.json

@@ -0,0 +1,41 @@
+{
+  "app": {
+    "title": "Tanemaki"
+  },
+  "inventory": {
+    "title": "Inventario",
+    "searchHint": "Buscar semillas",
+    "empty": "Aún no hay semillas. Toca + para añadir la primera.",
+    "uncategorized": "Sin categoría"
+  },
+  "quickAdd": {
+    "title": "Añadir una semilla",
+    "labelField": "Nombre",
+    "labelRequired": "Ponle un nombre",
+    "addPhoto": "Añadir foto",
+    "quantity": "¿Cuánta?",
+    "more": "Añadir más…",
+    "save": "Guardar",
+    "cancel": "Cancelar"
+  },
+  "quantityKind": {
+    "aFew": "unas pocas",
+    "some": "algunas",
+    "plenty": "muchas",
+    "handful": "un puñado",
+    "pinch": "una pizca",
+    "jar": "un tarro",
+    "packet": "un sobre",
+    "cob": "una mazorca",
+    "head": "una cabezuela",
+    "pod": "una vaina",
+    "ear": "una espiga",
+    "fruit": "un fruto",
+    "bulb": "un bulbo",
+    "tuber": "un tubérculo",
+    "seedHead": "una cabeza de semillas",
+    "bunch": "un manojo",
+    "grams": "gramos",
+    "count": "unidades"
+  }
+}