Add icon for KDL files (#35377)

<img width="191" height="83" alt="1753920601"
src="https://github.com/user-attachments/assets/6bf057b0-2f10-4cc7-bab1-2d4aa8675701"
/>

Release Notes:

- Added icon for KDL (`.kdl`) files

assets/icons/file_icons/kdl.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="none" viewBox="0 0 16 16"><g style="fill:#000"><path fill="#edd7ff" d="M283.371 159.177q-24.185 1.507-37.97-10.661-13.786-12.17-15.328-36.943L210.45-203.41q-1.506-24.184 11.768-39.223 13.828-15.665 38.602-17.208 25.363-1.58 41.029 12.247 15.628 13.239 17.135 37.423L336.29 67.651l135.67-8.452c34.21-2.131 52.23 11.55 54.07 41.043q1.395 22.415-10.92 33.84-11.715 11.39-37.68 13.006z" style="fill:#000" transform="translate(8.262 8.689)scale(.01252)"/><path fill="#d7f8ff" d="M-172.688 139.602q-23.87-4.164-34.444-19.207-10.575-15.042-6.411-38.913L-159.211-230q4.164-23.87 19.207-34.445t38.913-6.41l117.607 20.514q68.118 11.881 112.657 45.447 45.222 33.085 63.399 83.65 18.175 50.565 7.107 114.025-11.172 64.044-45.495 106.05-33.64 41.526-87.394 57.347-53.17 15.921-121.871 3.938zM-47.62 72.629q59.968 10.46 94.738-13.471 35.454-24.412 46.016-84.961 10.563-60.55-14.635-94.941-24.615-34.29-84.582-44.751l-52.399-9.14-41.537 238.124z" style="fill:#000" transform="translate(8.262 8.689)scale(.01252)"/><path fill="#ffb2b2" d="M-194.146 57.186q16.518 13.475 18.106 32.913 1.588 19.439-11.934 35.367-13.523 15.93-33.55 17.566-21.795 1.78-41.595-15.577L-445.048-30.827l11.358 139.013q2.022 24.74-11.501 40.668-13.571 15.34-38.899 17.41-24.74 2.022-40.621-10.912-15.34-13.572-17.362-38.311l-25.748-315.135q-1.974-24.15 11.009-39.442 13.522-15.93 38.262-17.95 25.329-2.07 41.258 11.453 15.88 12.933 17.854 37.084l10.588 129.588 151.899-180.221q14.016-17.156 33.454-18.744t35.367 11.934q15.882 12.935 17.469 32.372 1.589 19.439-14.146 37.327L-335.886-66.43Z" style="fill:#000" transform="translate(8.262 8.689)scale(.01252)"/></g></svg>

crates/theme/src/icon_theme.rs

@@ -152,6 +152,7 @@ const FILE_SUFFIXES_BY_ICON_KEY: &[(&str, &[&str])] = &[
     ("javascript", &["cjs", "js", "mjs"]),
     ("json", &["json"]),
     ("julia", &["jl"]),
+    ("kdl", &["kdl"]),
     ("kotlin", &["kt"]),
     ("lock", &["lock"]),
     ("log", &["log"]),
@@ -315,6 +316,7 @@ const FILE_ICONS: &[(&str, &str)] = &[
     ("javascript", "icons/file_icons/javascript.svg"),
     ("json", "icons/file_icons/code.svg"),
     ("julia", "icons/file_icons/julia.svg"),
+    ("kdl", "icons/file_icons/kdl.svg"),
     ("kotlin", "icons/file_icons/kotlin.svg"),
     ("lock", "icons/file_icons/lock.svg"),
     ("log", "icons/file_icons/info.svg"),