feat(config): add experimental.hashline_edit flag and provider state module

src/tools/hashline-edit/hash-computation.ts

@@ -0,0 +1,19 @@
+import { HASH_DICT } from "./constants"
+
+export function computeLineHash(lineNumber: number, content: string): string {
+  const stripped = content.replace(/\s+/g, "")
+  const hash = Bun.hash.xxHash32(stripped)
+  const index = hash % 256
+  return HASH_DICT[index]
+}
+
+export function formatHashLine(lineNumber: number, content: string): string {
+  const hash = computeLineHash(lineNumber, content)
+  return `${lineNumber}:${hash}|${content}`
+}
+
+export function formatHashLines(content: string): string {
+  if (!content) return ""
+  const lines = content.split("\n")
+  return lines.map((line, index) => formatHashLine(index + 1, line)).join("\n")
+}