docs(input): add start/end slot section back into v7 docs (#3509)

* docs(input): add start/end slot section back into v7 docs

* fix demo imports

Author: averyjohnston

static/usage/v7/input/start-end-slots/demo.html

@@ -4,8 +4,8 @@
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Input</title>
-    <link rel="stylesheet" href="../../../common.css" />
-    <script src="../../../common.js"></script>
+    <link rel="stylesheet" href="../../common.css" />
+    <script src="../../common.js"></script>
     <script type="module" src="https://cdn.jsdelivr.net/npm/@ionic/core@7/dist/ionic/ionic.esm.js"></script>
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@ionic/core@7/css/ionic.bundle.css" />
   </head>

versioned_docs/version-v7/api/input.md

@@ -147,6 +147,22 @@ Please submit bug reports with Maskito to the [Maskito Github repository](https:
 
 :::
 
+## Start and End Slots (experimental)
+
+The `start` and `end` slots can be used to place icons, buttons, or prefix/suffix text on either side of the input.
+
+Note that this feature is considered experimental because it relies on a simulated version of [Web Component slots](https://developer.mozilla.org/en-US/docs/Web/API/Web_components/Using_templates_and_slots). As a result, the simulated behavior may not exactly match the native slot behavior.
+
+:::note
+In most cases, [Icon](./icon.md) components placed in these slots should have `aria-hidden="true"`. See the [Icon accessibility docs](https://ionicframework.com/docs/api/icon#accessibility) for more information.
+
+If slot content is meant to be interacted with, it should be wrapped in an interactive element such as a [Button](./button.md). This ensures that the content can be tabbed to.
+:::
+
+import StartEndSlots from '@site/static/usage/v7/input/start-end-slots/index.md';
+
+<StartEndSlots />
+
 ## Theming
 
 ### Colors