feat(select): add focus on tab (#30076)

Issue number: internal

---------

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## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

- Added focus styles on tab for the ion-select, using the --highlight
variable.
- Adjusted highlight tests to work for ionic as well, just for the
outline type.
- Fixed select border-color token used and updated snapshots (this
affected all ionic theme snapshots for select). Although not directly
related to focus task, the incorrect color was making it very hard to
see the differences between the focus colors.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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## Other information

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screenshots of how the component looks before and after the change. -->

- [Select
focus](https://ionic-framework-git-rou-11445-select-ionic1.vercel.app/src/components/select/test/highlight?ionic:theme=ionic)

---------

Co-authored-by: ionitron <[email protected]>
Co-authored-by: Maria Hutt <[email protected]>

Author: 3 people

core/src/components/select/select.ionic.outline.scss

@@ -50,3 +50,23 @@
 
   box-sizing: border-box;
 }
+
+// Focus
+// ---------------------------------------------
+
+:host(.ion-focused.select-fill-outline) {
+  --border-color: var(--highlight-color);
+}
+
+:host(.ion-focused.select-fill-outline:not(.ion-invalid):not(.ion-valid)) {
+  --border-width: #{globals.$ion-border-size-050};
+}
+
+/**
+ * If the select has a validity state, the
+ * border should reflect that as a color.
+ */
+:host(.has-focus.select-fill-outline.ion-valid),
+:host(.select-fill-outline.ion-touched.ion-invalid) {
+  --border-color: var(--highlight-color);
+}

core/src/components/select/select.ionic.scss

@@ -9,14 +9,17 @@
   --background: #{globals.$ion-primitives-base-white};
   // TODO(ROU-10778, ROU-10875): Sync the color names to the design system of
   // ios and md. This will allow us to have a single color map.
-  --border-color: #{globals.current-color(neutral)};
+  --border-color: #{globals.$ion-primitives-neutral-500};
   --border-width: #{globals.$ion-border-size-025};
   --padding-start: #{globals.$ion-space-400};
   --padding-end: #{globals.$ion-space-400};
   --padding-top: #{globals.$ion-space-300};
   --padding-bottom: #{globals.$ion-space-300};
   --placeholder-color: #{globals.$ion-primitives-neutral-800};
   --placeholder-opacity: 1;
+  --highlight-color-focused: #{globals.$ion-border-focus-default};
+  --highlight-color-valid: #{globals.$ion-semantics-success-900};
+  --highlight-color-invalid: #{globals.$ion-semantics-danger-800};
 }
 
 // Select Label