docs: add iconify docs

docs/utilities/iconify.md

@@ -0,0 +1,36 @@
+# QIconifyIcon
+
+[Iconify](https://iconify.design/) is an icon library that includes 150,000+
+icons from most major icon sets including Bootstrap, FontAwesome, Material
+Design, and many more; each available as individual SVGs.  Unlike the
+[`superqt.fonticon` module](./fonticon.md), `superqt.QIconifyIcon` does not require any additional
+dependencies or font files to be installed.  Icons are downloaded (and cached)
+on-demand from the Iconify API, using [pyconify](https://github.com/pyapp-kit/pyconify)
+
+Search availble icons at <https://icon-sets.iconify.design>
+Once you find one you like, use the key in the format `"prefix:name"` to create an
+icon:  `QIconifyIcon("bi:bell")`.
+
+## Basic Example
+
+```python
+from qtpy.QtCore import QSize
+from qtpy.QtWidgets import QApplication, QPushButton
+
+from superqt import QIconifyIcon
+
+app = QApplication([])
+
+btn = QPushButton()
+btn.setIcon(QIconifyIcon("fluent-emoji-flat:alarm-clock"))
+btn.setIconSize(QSize(60, 60))
+btn.show()
+
+app.exec()
+```
+
+{{ show_widget(225) }}
+
+::: superqt.QIconifyIcon
+    options:
+        heading_level: 3

docs/utilities/index.md

@@ -12,6 +12,12 @@
 | [`IconOpts`](./fonticon.md#superqt.fonticon.IconOpts) | Options for rendering an icon |
 | [`Animation`](./fonticon.md#superqt.fonticon.Animation) | Base class for adding animations to a font-icon. |
 
+## SVG Icons
+
+| Object                          | Description           |
+| -----------                     | --------------------- |
+| [`QIconifyIcon`](./iconify.md)  | QIcons backed by the [Iconify](https://iconify.design/) icon library. |
+
 ## Threading tools
 
 | Object                          | Description           |

mkdocs.yml

@@ -32,8 +32,8 @@ markdown_extensions:
   - attr_list
   - md_in_html
   - pymdownx.emoji:
-      emoji_index: !!python/name:materialx.emoji.twemoji
-      emoji_generator: !!python/name:materialx.emoji.to_svg
+      emoji_index: !!python/name:material.extensions.emoji.twemoji
+      emoji_generator: !!python/name:material.extensions.emoji.to_svg
   - toc:
       permalink: "#"
 

pyproject.toml

@@ -67,11 +67,11 @@ dev = [
     "types-Pygments",
 ]
 docs = [
-    "mkdocs-macros-plugin",
-    "mkdocs-material",
-    "mkdocstrings[python]",
-    "pint",
-    "cmap",
+    "mkdocs-macros-plugin ==1.3.7",
+    "mkdocs-material ==9.5.49",
+    "mkdocstrings ==0.27.0",
+    "mkdocstrings-python ==1.13.0",
+    "superqt[font-fa5, cmap, quantity]",
 ]
 quantity = ["pint"]
 cmap = ["cmap >=0.1.1"]