refactor(core): Centralize shell logic into ShellExecutionService (#4823)

packages/cli/src/ui/utils/textUtils.ts

@@ -17,35 +17,6 @@ export const getAsciiArtWidth = (asciiArt: string): number => {
   return Math.max(...lines.map((line) => line.length));
 };
 
-/**
- * Checks if a Buffer is likely binary by testing for the presence of a NULL byte.
- * The presence of a NULL byte is a strong indicator that the data is not plain text.
- * @param data The Buffer to check.
- * @param sampleSize The number of bytes from the start of the buffer to test.
- * @returns True if a NULL byte is found, false otherwise.
- */
-export function isBinary(
-  data: Buffer | null | undefined,
-  sampleSize = 512,
-): boolean {
-  if (!data) {
-    return false;
-  }
-
-  const sample = data.length > sampleSize ? data.subarray(0, sampleSize) : data;
-
-  for (const byte of sample) {
-    // The presence of a NULL byte (0x00) is one of the most reliable
-    // indicators of a binary file. Text files should not contain them.
-    if (byte === 0) {
-      return true;
-    }
-  }
-
-  // If no NULL bytes were found in the sample, we assume it's text.
-  return false;
-}
-
 /*
  * -------------------------------------------------------------------------
  *  Unicode‑aware helpers (work at the code‑point level rather than UTF‑16