feat(ui): improve hasMany TextField UX (#10976)

### What?

This updates the UX of `TextFields` with `hasMany: true` by:
- Removing the dropdown menu and its indicator
- Removing the ClearIndicator
- Making text items directly editable

### Why?
- The dropdown didn’t enhance usability.
- The ClearIndicator removed all values at once with no way to undo,
risking accidental data loss. Backspace still allows quick and
intentional clearing.
- Previously, text items could only be removed and re-added, but not
edited inline. Allowing inline editing improves the editing experience.

### How?


https://github.com/user-attachments/assets/02e8cc26-7faf-4444-baa1-39ce2b4547fa

test/fields/collections/Text/e2e.spec.ts

@@ -240,4 +240,44 @@ describe('Text', () => {
     await expect(field.locator('.rs__value-container')).toContainText(input)
     await expect(field.locator('.rs__value-container')).toContainText(furtherInput)
   })
+
+  test('should allow editing hasMany text field values by clicking', async () => {
+    const originalText = 'original'
+    const newText = 'new'
+
+    await page.goto(url.create)
+
+    // fill required field
+    const requiredField = page.locator('#field-text')
+    await requiredField.fill(String(originalText))
+
+    const field = page.locator('.field-hasMany')
+
+    // Add initial value
+    await field.click()
+    await page.keyboard.type(originalText)
+    await page.keyboard.press('Enter')
+
+    // Click to edit existing value
+    const value = field.locator('.multi-value-label__text')
+    await value.click()
+    await value.dblclick()
+    await page.keyboard.type(newText)
+    await page.keyboard.press('Enter')
+
+    await saveDocAndAssert(page)
+    await expect(field.locator('.rs__value-container')).toContainText(`${newText}`)
+  })
+
+  test('should not allow editing hasMany text field values when disabled', async () => {
+    await page.goto(url.create)
+    const field = page.locator('.field-readOnlyHasMany')
+
+    // Try to click to edit
+    const value = field.locator('.multi-value-label__text')
+    await value.click({ force: true })
+
+    // Verify it does not become editable
+    await expect(field.locator('.multi-value-label__text')).not.toHaveClass(/.*--editable/)
+  })
 })

test/fields/collections/Text/index.ts

@@ -127,6 +127,15 @@ const TextFields: CollectionConfig = {
       type: 'text',
       hasMany: true,
     },
+    {
+      name: 'readOnlyHasMany',
+      type: 'text',
+      hasMany: true,
+      admin: {
+        readOnly: true,
+      },
+      defaultValue: ['default'],
+    },
     {
       name: 'validatesHasMany',
       type: 'text',