fix(compass): keep button labeling consistent w/ lowercase (#7050)

fix: keep button labeling consistent w/ lowercase

Author: myang1220

package-lock.json

@@ -23,7 +23,7 @@ describe('AddStage', function () {
       renderAddStage({ variant: 'icon' });
       const button = screen.getByTestId('add-stage-icon-button');
       expect(() => {
-        within(button).getByText('Add Stage');
+        within(button).getByText('Add stage');
       }).to.throw;
     });
 
@@ -41,7 +41,7 @@ describe('AddStage', function () {
     it('renders text button', function () {
       renderAddStage({ variant: 'button' });
       const button = screen.getByTestId('add-stage');
-      expect(within(button).getByText('Add Stage')).to.exist;
+      expect(within(button).getByText('Add stage')).to.exist;
     });
 
     it('renders help link when stage is not last', function () {

packages/compass-aggregations/src/components/add-stage/add-stage.spec.tsx

@@ -42,7 +42,7 @@ export const AddStage = ({ onAddStage, variant }: AddStageProps) => {
             variant="primary"
             leftGlyph={<Icon glyph="Plus"></Icon>}
           >
-            Add Stage
+            Add stage
           </Button>
 
           <div className={linkContainerStyles}>

packages/compass-aggregations/src/components/add-stage/add-stage.tsx

@@ -36,7 +36,7 @@ describe('PipelineBuilderUIWorkspace [Component]', function () {
       await renderPipelineBuilderUIWorkspace();
       const buttons = screen.getAllByTestId('add-stage');
       expect(buttons.length).to.equal(1);
-      expect(buttons[0]).to.have.text('Add Stage');
+      expect(buttons[0]).to.have.text('Add stage');
     });
 
     it('adds a stage to the start of pipeline when first icon button is clicked', async function () {
@@ -95,7 +95,7 @@ describe('PipelineBuilderUIWorkspace [Component]', function () {
       await renderPipelineBuilderUIWorkspace({}, { pipeline: [] });
       const button = screen.getByTestId('add-stage');
       expect(button).to.exist;
-      expect(button).to.have.text('Add Stage');
+      expect(button).to.have.text('Add stage');
     });
 
     it('adds a stage when (text) button is clicked', async function () {

packages/compass-aggregations/src/components/pipeline-builder-workspace/pipeline-builder-ui-workspace/index.spec.tsx

@@ -447,7 +447,7 @@ const DocumentList: React.FunctionComponent<DocumentListProps> = (props) => {
                         variant="primary"
                         size="small"
                       >
-                        Import Data
+                        Import data
                       </Button>
                     )
                   }

packages/compass-crud/src/components/document-list.tsx

@@ -264,7 +264,7 @@ export function ValidationStates({
                     variant={ButtonVariant.PrimaryOutline}
                     size="small"
                   >
-                    Add Rule
+                    Add rule
                   </Button>
                 </div>
               }

packages/compass-schema-validation/src/components/validation-states.tsx

@@ -269,7 +269,7 @@ const InitialScreen: React.FunctionComponent<{
           variant="primary"
           size="small"
         >
-          Analyze Schema
+          Analyze schema
         </Button>
       }
       callToActionLink={