Add Material Design Symbols

.gitmodules

@@ -10,3 +10,6 @@
 	path = source/icon-development-kit
 	url = https://gitlab.gnome.org/Teams/Design/icon-development-kit.git
 	update = none
+[submodule "source/material-symbols"]
+	path = source/material-symbols
+	url = https://github.com/marella/material-symbols.git

README.md

@@ -7,7 +7,7 @@
 ![Minimum Rust version 1.85](https://img.shields.io/badge/rustc-1.85+-06a096.svg)
 [![dependency status](https://deps.rs/repo/github/Relm4/icons/status.svg)](https://deps.rs/repo/github/Relm4/icons)
 
-More than 3000 icons, ready for use in your app!
+More than 10,000 icons, ready for use in your app!
 
 ## Installing librsvg
 
@@ -29,7 +29,7 @@ gvsbuild build librsvg
 
 ### 1. Find your icons 🔍
 
-You can either use the of the over 3000 shipped icons or your own icons.
+You can use any of the over 10,000 shipped icons or your own icons.
 You can browse the shipped icons using one of the following methods:
 
 For icons from the GNOME [icon-development-kit](https://gitlab.gnome.org/Teams/Design/icon-development-kit):
@@ -39,6 +39,9 @@ For icons from the GNOME [icon-development-kit](https://gitlab.gnome.org/Teams/D
 For icons from [Fluent UI System Icons](https://github.com/microsoft/fluentui-system-icons):
 + Browse the [fluent icon library catalog](https://aka.ms/fluentui-system-icons)
 
+For icons from [Material Symbols](https://github.com/marella/material-symbols/):
++ Browse the [Google Fonts Material Symbols resource](https://fonts.google.com/icons?icon.set=Material+Symbols&icon.style=Outlined) website
+
 For icons from [the previous version of the GNOME development kit](https://gitlab.gnome.org/Teams/Design/icon-development-kit-www/):
 + Browse the [archived GNOME icon resource](https://web.archive.org/web/20250718142224/https://teams.pages.gitlab.gnome.org/Design/icon-development-kit-www/).
 
@@ -151,6 +154,7 @@ git submodule update --remote --checkout
 rm -rf build_icons/icons/fluentui-system-icons
 rm -rf build_icons/icons/icon-development-kit-www
 rm -rf build_icons/icons/icon-development-kit
+rm -rf build_icons/icons/material-design-icons
 cd update_icons
 cargo run --bin fetch_icons
 cargo run
@@ -170,5 +174,6 @@ The source code of Relm4 icons is licensed under the terms of both the MIT licen
 
 + The icons in the `icons/icon-development-kit` and `icons/icon-development-kit-www` folders are licensed under the terms of the [CC0 license](https://creativecommons.org/share-your-work/public-domain/cc0/) and therefore public domain.
 + The icons in the `icons/fluentui-system-icons` folder are licensed under the terms of the [MIT license](https://opensource.org/license/MIT/).
++ The icons in the `icons/material-design-icons` folder are licensed under the terms of the [Apache 2.0 License](https://www.apache.org/licenses/LICENSE-2.0).
 
-Both licenses should work for both open source and proprietary applications (without warranty).
+These licenses should work for both open source and proprietary applications (without warranty).