feat: add GLM-5 model support (#14352) (#15867)

Merged via /review-pr -> /prepare-pr -> /merge-pr.

Prepared head SHA: 0e3289a594
Co-authored-by: battman21 <2656916+battman21@users.noreply.github.com>
Co-authored-by: steipete <58493+steipete@users.noreply.github.com>
Reviewed-by: @steipete

src/agents/synthetic-models.ts

@@ -155,6 +155,14 @@ export const SYNTHETIC_MODEL_CATALOG = [
     contextWindow: 198000,
     maxTokens: 128000,
   },
+  {
+    id: "hf:zai-org/GLM-5",
+    name: "GLM-5",
+    reasoning: true,
+    input: ["text", "image"],
+    contextWindow: 256000,
+    maxTokens: 128000,
+  },
   {
     id: "hf:deepseek-ai/DeepSeek-V3",
     name: "DeepSeek V3",