feat: add scroll speed to config (#1968)

packages/opencode/src/config/config.ts

@@ -274,6 +274,10 @@ export namespace Config {
       ref: "KeybindsConfig",
     })
 
+  export const TUI = z.object({
+    scroll_speed: z.number().min(1).optional().default(2).describe("TUI scroll speed"),
+  })
+
   export const Layout = z.enum(["auto", "stretch"]).openapi({
     ref: "LayoutConfig",
   })
@@ -284,6 +288,7 @@ export namespace Config {
       $schema: z.string().optional().describe("JSON schema reference for configuration validation"),
       theme: z.string().optional().describe("Theme name to use for the interface"),
       keybinds: Keybinds.optional().describe("Custom keybind configurations"),
+      tui: TUI.optional().describe("TUI specific settings"),
       plugin: z.string().array().optional(),
       snapshot: z.boolean().optional(),
       share: z