composition skeleton: L1 accounting domain + six L2 function-group packages

Step 2 of the vk-gramatvediba build (absorbs the planned Step 3 — the
enterprise index now references the domain, since the two are one
coherent unit).

- domains/gramatvediba/ — L1 domain package; includes the six FG packages
- processes/fg1..fg6/ — six L2 function-group packages (composition stubs;
  FG3 carries its sub-process inventory and is taken to executable depth
  in later steps)
- each package: uapf.yaml + metadata/ownership.yaml + metadata/lifecycle.yaml
  + README
- enterprise/enterprise.yaml now references the L1 domain

All 22 manifests and metadata files validate against the UAPF 2.2.0
schemas; all seven includes / enterprise references resolve.

domains/gramatvediba/uapf.yaml

@@ -0,0 +1,22 @@
+kind: uapf.package
+id: vk.gramatvediba.domain
+name: "Grāmatvedības uzskaite — accounting domain"
+description: "Level 1 domain composing the six Valsts Kase / VPC accounting function groups (FG1-FG6)."
+level: 1
+version: 0.1.0
+includes:
+  - ../../processes/fg1
+  - ../../processes/fg2
+  - ../../processes/fg3
+  - ../../processes/fg4
+  - ../../processes/fg5
+  - ../../processes/fg6
+cornerstones:
+  bpmn: false
+  dmn: false
+  cmmn: false
+  resources: false
+owners:
+  - type: team
+    id: vpc
+lifecycle: draft