feat(many): default components to Phosphor Icons for ionic theme (#29617)

Issue number: internal

---------

## What is the current behavior?
Icons in the Ionic theme default to Ionicons.

## What is the new behavior?
- Renames the following config properties:
  - `datetimeShowMonthYearIcon` to `datetimeExpandedIcon`
  - `datetimeHideMonthYearIcon` to `datetimeCollapsedIcon`
  - `selectExpandIcon` to `selectExpandedIcon`
- Updates the icons for the `ionic` theme to the following Phosphor
Icons:

| Component | Config | Phosphor Icon | Font Weight |
| ------------------------ | --------------------------- |
----------------- | ----------- |
| Accordion | `accordionToggleIcon` | `CaretDown` | `regular` |
| Back Button | `backButtonIcon` | `CaretLeft` | `regular` |
| Breadcrumb | `breadcrumbSeparatorIcon` | `CaretRight` | `regular` |
| Breadcrumb | `breadcrumbCollapsedIcon` | `DotsThree` | `regular` |
| Checkbox | N/A | `Check` | `bold` |
| Checkbox (indeterminate) | N/A | `Minus` | `bold` |
| Datetime | `datetimeNextIcon` | `CaretRight` | `regular` |
| Datetime | `datetimePreviousIcon` | `CaretLeft` | `regular` |
| Datetime | `datetimeCollapsedIcon` | `CaretDown` | `regular` |
| Datetime | `datetimeExpandedIcon` | `CaretUp` | `regular` |
| Fab Button | `fabButtonCloseIcon` | `X` | `regular` |
| Input | `inputClearIcon` | `X` | `regular` |
| Input Password Toggle | `inputPasswordShowIcon` | `Eye` | `regular` |
| Input Password Toggle | `inputPasswordHideIcon` | `EyeSlash` |
`regular` |
| Item | `itemDetailIcon` | `CaretRight` | `regular` |
| Menu Button | `menuIcon` | `List` | `regular` |
| Reorder | `reorderHandleIcon` | `List` | `regular` |
| Refresher | `refreshingIcon` | ❌ | |
| Refresher (arrow icon) | N/A | `CaretLeft` | `fill` |
| Searchbar | `searchbarCancelIcon` | `ArrowLeft` | `regular` |
| Searchbar | `searchbarClearIcon` | `X` | `regular` |
| Searchbar | `searchbarSearchIcon` | `MagnifyingGlass` | `regular` |
| Select | `selectExpandedIcon` | `CaretDown` | `regular` |
| Select | `selectCollapsedIcon` | `CaretDown` | `regular` |
| Toggle | `toggleCheckedIcon` | `LineVertical` | `regular` |
| Toggle | `toggleUncheckedIcon` | `Circle` | `regular` |

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

core/src/components/fab-button/fab-button.tsx

@@ -1,3 +1,4 @@
+import xRegular from '@phosphor-icons/core/assets/regular/x.svg';
 import type { ComponentInterface, EventEmitter } from '@stencil/core';
 import { Component, Element, Event, Host, Prop, h } from '@stencil/core';
 import type { AnchorInterface, ButtonInterface } from '@utils/element-interface';
@@ -153,8 +154,30 @@ export class FabButton implements ComponentInterface, AnchorInterface, ButtonInt
     this.inheritedAttributes = inheritAriaAttributes(this.el);
   }
 
+  get fabButtonCloseIcon() {
+    // Return the icon if it is explicitly set
+    if (this.closeIcon != null) {
+      return this.closeIcon;
+    }
+
+    // Determine the theme and map to default icons
+    const theme = getIonTheme(this);
+    const defaultIcons = {
+      ios: close,
+      ionic: xRegular,
+      md: close,
+    };
+
+    // Get the default icon based on the theme, falling back to 'md' icon if necessary
+    const defaultIcon = defaultIcons[theme] || defaultIcons.md;
+
+    // Return the configured fab button close icon or the default icon
+    return config.get('fabButtonCloseIcon', defaultIcon);
+  }
+
   render() {
-    const { el, disabled, color, href, activated, show, translucent, size, inheritedAttributes } = this;
+    const { el, disabled, fabButtonCloseIcon, color, href, activated, show, translucent, size, inheritedAttributes } =
+      this;
     const inList = hostContext('ion-fab-list', el);
     const theme = getIonTheme(this);
     const TagType = href === undefined ? 'button' : ('a' as any);
@@ -167,7 +190,6 @@ export class FabButton implements ComponentInterface, AnchorInterface, ButtonInt
             rel: this.rel,
             target: this.target,
           };
-    const fabButtonCloseIcon = this.closeIcon ?? config.get('fabButtonCloseIcon', close);
 
     return (
       <Host