feat: make chat file references clickable and responsive (#587)

* docs: clarify named and quick Cloudflare tunnel usage

* feat: make chat file paths openable from rendered responses

* perf: speed up chat file-path links and open behavior

* fix: open chat file references at mentioned lines

* fix: prevent context panel flicker on blocked file opens

packages/ui/src/lib/fileOpenLimits.ts

@@ -0,0 +1,19 @@
+export const MAX_OPEN_FILE_LINES = 5_000;
+
+export const countLinesWithLimit = (content: string, limit: number): number => {
+  if (!content) {
+    return 1;
+  }
+
+  let lines = 1;
+  for (let index = 0; index < content.length; index += 1) {
+    if (content.charCodeAt(index) === 10) {
+      lines += 1;
+      if (lines > limit) {
+        return lines;
+      }
+    }
+  }
+
+  return lines;
+};