Remove width constraints from all columns to allow grid auto-sizing

Co-authored-by: tishko0 <15924795+tishko0@users.noreply.github.com>

Author: Copilot

samples/grids/grid/cell-selection-custom-palette/src/index.tsx

@@ -44,37 +44,31 @@ export default class Sample extends React.Component<any, any> {
                     <IgrColumn
                         field="ID"
                         header="Customer ID"
-                        width="120px"
                         sortable={true}>
                     </IgrColumn>
                     <IgrColumn
                         field="Company"
                         header="Company Name"
-                        width="200px"
                         sortable={true}>
                     </IgrColumn>
                     <IgrColumn
                         field="ContactName"
                         header="Contact"
-                        width="150px"
                         sortable={true}>
                     </IgrColumn>
                     <IgrColumn
                         field="City"
                         header="City"
-                        width="120px"
                         sortable={true}>
                     </IgrColumn>
                     <IgrColumn
                         field="Country"
                         header="Country"
-                        width="120px"
                         sortable={true}>
                     </IgrColumn>
                     <IgrColumn
                         field="Phone"
-                        header="Phone"
-                        width="150px">
+                        header="Phone">
                     </IgrColumn>
                 </IgrGrid>
             </div>

samples/grids/hierarchical-grid/cell-selection-custom-palette/src/index.tsx

@@ -82,15 +82,12 @@ export default class Sample extends React.Component<any, any> {
                         field="Photo"
                         header="Photo"
                         dataType="image"
-                        minWidth="115px"
                         resizable={true}>
                     </IgrColumn>
                     <IgrColumn
                         field="Debut"
                         header="Debut"
                         dataType="number"
-                        minWidth="88px"
-                        maxWidth="230px"
                         resizable={true}
                         sortable={true}>
                     </IgrColumn>

samples/grids/tree-grid/cell-selection-custom-palette/src/index.tsx

@@ -48,42 +48,36 @@ export default class Sample extends React.Component<any, any> {
                         field="ID"
                         header="Order ID"
                         dataType="number"
-                        width="120px"
                         sortable={true}>
                     </IgrColumn>
                     <IgrColumn
                         field="Name"
                         dataType="string"
                         header="Order Product"
-                        width="200px"
                         sortable={true}>
                     </IgrColumn>
                     <IgrColumn
                         field="Units"
                         dataType="number"
                         header="Units"
-                        width="120px"
                         sortable={true}>
                     </IgrColumn>
                     <IgrColumn
                         field="UnitPrice"
                         header="Unit Price"
                         dataType="currency"
-                        width="150px"
                         sortable={true}>
                     </IgrColumn>
                     <IgrColumn
                         field="Price"
                         header="Price"
                         dataType="currency"
-                        width="150px"
                         sortable={true}>
                     </IgrColumn>
                     <IgrColumn
                         field="OrderDate"
                         header="Order Date"
                         dataType="date"
-                        width="150px"
                         sortable={true}>
                     </IgrColumn>
                 </IgrTreeGrid>