Add icons for Puppet files (#35778)

Release Notes:

- Added icon for Puppet (.pp) files

Actually puppet icons are available in the extension here :
<https://github.com/AlexandarY/zed-puppet/tree/main/icon_themes>

---------

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>

assets/icons/file_icons/puppet.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="17" height="16" fill="none"><path fill="#000" d="M12.5 9.639V6.354H9.683L8.18 5.007V2.5H4.5v3.285h2.817l1.51 1.347v1.736l-1.51 1.347H4.5V13.5h3.681v-2.507l1.51-1.347H12.5v-.007ZM5.727 3.595h1.227V4.69H5.727V3.595Zm1.227 8.803H5.727v-1.095h1.227v1.095Z"/></svg>

crates/theme/src/icon_theme.rs

@@ -183,6 +183,7 @@ const FILE_SUFFIXES_BY_ICON_KEY: &[(&str, &[&str])] = &[
         ],
     ),
     ("prisma", &["prisma"]),
+    ("puppet", &["pp"]),
     ("python", &["py"]),
     ("r", &["r", "R"]),
     ("react", &["cjsx", "ctsx", "jsx", "mjsx", "mtsx", "tsx"]),
@@ -331,6 +332,7 @@ const FILE_ICONS: &[(&str, &str)] = &[
     ("php", "icons/file_icons/php.svg"),
     ("prettier", "icons/file_icons/prettier.svg"),
     ("prisma", "icons/file_icons/prisma.svg"),
+    ("puppet", "icons/file_icons/puppet.svg"),
     ("python", "icons/file_icons/python.svg"),
     ("r", "icons/file_icons/r.svg"),
     ("react", "icons/file_icons/react.svg"),