feat: Add 'no id' query

Author: claremacrae

src/Query/Filter/IdField.ts

@@ -9,6 +9,7 @@ export class IdField extends Field {
     constructor() {
         super();
         this.filterInstructions.add('has id', (task: Task) => task.id.length > 0);
+        this.filterInstructions.add('no id', (task: Task) => task.id.length === 0);
     }
 
     public canCreateFilterForLine(line: string): boolean {

tests/Query/Filter/IdField.test.ts

@@ -19,4 +19,15 @@ describe('id', () => {
         testFilter(filter, new TaskBuilder().id(''), false);
         testFilter(filter, new TaskBuilder().id('abcdef'), true);
     });
+
+    it('by id absence', () => {
+        // Arrange
+        const line = 'no id';
+        const filter = new IdField().createFilterOrErrorMessage(line);
+        expect(idField.canCreateFilterForLine(line)).toEqual(true);
+
+        // Act, Assert
+        testFilter(filter, new TaskBuilder().id(''), true);
+        testFilter(filter, new TaskBuilder().id('abcdef'), false);
+    });
 });

tests/Query/Query.test.ts

@@ -103,6 +103,7 @@ describe('Query parsing', () => {
         'no created date',
         'no due date',
         'no happens date',
+        'no id',
         'no scheduled date',
         'no start date',
         'no tag',