feat: Add control permission to PermissionSet

This is in preparation of generalizing permissions
of auxiliary resources.

src/ldp/permissions/MethodPermissionsExtractor.ts

@@ -23,6 +23,7 @@ export class MethodPermissionsExtractor extends PermissionsExtractor {
     const read = READ_METHODS.has(method);
     const write = WRITE_METHODS.has(method);
     const append = write || APPEND_METHODS.has(method);
-    return { read, write, append };
+    const control = false;
+    return { read, write, append, control };
   }
 }

src/ldp/permissions/PermissionSet.ts

@@ -1,8 +1,9 @@
 /**
- * A data interface indicating which permissions are allowed (based on the context).
+ * A data interface indicating which permissions are required (based on the context).
  */
 export interface PermissionSet {
   read: boolean;
   append: boolean;
   write: boolean;
+  control: boolean;
 }

src/ldp/permissions/SparqlPatchPermissionsExtractor.ts

@@ -35,7 +35,8 @@ export class SparqlPatchPermissionsExtractor extends PermissionsExtractor {
     const read = false;
     const write = this.needsWrite(update);
     const append = write || this.needsAppend(update);
-    return { read, write, append };
+    const control = false;
+    return { read, write, append, control };
   }
 
   private isSparql(data: Representation): data is SparqlUpdatePatch {