feat(subspecialist-position): implement crud operations for subspecialist positions

- Add new handler, service, and schema files for subspecialist position
- Update list configuration and entry form components
- Modify list view to display subspecialist position data
- Include subspecialist relation in position model

app/services/subspecialist-position.service.ts

@@ -0,0 +1,25 @@
+// Base
+import * as base from './_crud-base'
+
+const path = '/api/v1/subspecialist-position'
+const name = 'subspecialist-position'
+
+export function create(data: any) {
+  return base.create(path, data, name)
+}
+
+export function getList(params: any = null) {
+  return base.getList(path, params, name)
+}
+
+export function getDetail(id: number | string) {
+  return base.getDetail(path, id, name)
+}
+
+export function update(id: number | string, data: any) {
+  return base.update(path, id, data, name)
+}
+
+export function remove(id: number | string) {
+  return base.remove(path, id, name)
+}