🤖 feat: add Seti icons to file tree (#627)

- bundle the Seti glyph font + theme JSON for local use\n- render
per-file icons in the code review file tree with caching and
read-state-aware styling
- ensure node-pty typings resolve cleanly by re-exporting the shipped
prebuilt declarations

Author: kylecarbs

scripts/update_seti_icons.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+ASSET_DIR="$ROOT_DIR/src/browser/assets/file-icons"
+
+mkdir -p "$ASSET_DIR"
+
+curl -sSL "https://raw.githubusercontent.com/microsoft/vscode/main/extensions/theme-seti/icons/seti.woff" \
+  -o "$ASSET_DIR/seti.woff"
+
+curl -sSL "https://raw.githubusercontent.com/microsoft/vscode/main/extensions/theme-seti/icons/vs-seti-icon-theme.json" \
+  -o "$ASSET_DIR/seti-icon-theme.json"
+
+echo "Updated Seti icon assets in $ASSET_DIR"