initial commit with charts and assistant chat

bin/charting_library_update

@@ -0,0 +1,36 @@
+#!/bin/bash
+set -euo pipefail
+
+REMOTE_NAME="tradingview-charting"
+REMOTE_URL="git@github.com:tradingview/charting_library.git"
+PREFIX="web/public/charting_library"
+BRANCH="master"
+
+# Detect the default branch if master doesn't exist
+echo "Adding remote '$REMOTE_NAME'..."
+if git remote get-url "$REMOTE_NAME" &>/dev/null; then
+  echo "Remote '$REMOTE_NAME' already exists, skipping."
+else
+  git remote add "$REMOTE_NAME" "$REMOTE_URL"
+fi
+
+echo "Fetching from $REMOTE_URL (this may take a moment)..."
+git fetch "$REMOTE_NAME" "$BRANCH"
+
+if [ -d "$PREFIX" ]; then
+  echo "'$PREFIX' already exists — pulling latest changes..."
+  git subtree pull \
+    --prefix="$PREFIX" \
+    "$REMOTE_NAME" "$BRANCH" \
+    --squash \
+    -m "chore: update charting_library from tradingview upstream"
+else
+  echo "Adding '$PREFIX' for the first time..."
+  git subtree add \
+    --prefix="$PREFIX" \
+    "$REMOTE_NAME/$BRANCH":charting_library \
+    --squash \
+    -m "chore: add charting_library from tradingview/charting_library"
+fi
+
+echo "Done. Files are at: $PREFIX"