Revert "Drop support for Intel macOS (#37215)" (#37234)

This reverts commit eea07462fa.

scripts/platform.sh

@@ -1,51 +0,0 @@
-#!/usr/bin/env bash
-#
-# Centralized platform and architecture detection for openpilot.
-# Source this script to get OPENPILOT_ARCH set to one of:
-#   larch64  - linux tici arm64
-#   aarch64  - linux pc arm64
-#   x86_64   - linux pc x64
-#   Darwin   - macOS arm64
-#
-
-RED='\033[0;31m'
-GREEN='\033[0;32m'
-NC='\033[0m'
-
-OPENPILOT_ARCH=$(uname -m)
-
-# ── check OS and normalize arch ──────────────────────────────
-if [ -f /TICI ]; then
-  # TICI runs AGNOS — no OS validation needed
-  OPENPILOT_ARCH="larch64"
-
-elif [[ "$OSTYPE" == "darwin"* ]]; then
-  if [[ "$OPENPILOT_ARCH" == "x86_64" ]]; then
-    echo -e " ↳ [${RED}✗${NC}] Intel-based Macs are not supported!"
-    echo "       openpilot requires an Apple Silicon Mac (M1 or newer)."
-    exit 1
-  fi
-  echo -e " ↳ [${GREEN}✔${NC}] macOS detected."
-  OPENPILOT_ARCH="Darwin"
-
-elif [[ "$OSTYPE" == "linux-gnu"* ]]; then
-  if [ -f "/etc/os-release" ]; then
-    source /etc/os-release
-    case "$VERSION_CODENAME" in
-      "jammy" | "kinetic" | "noble" | "focal")
-        echo -e " ↳ [${GREEN}✔${NC}] Ubuntu $VERSION_CODENAME detected."
-        ;;
-      *)
-        echo -e " ↳ [${RED}✗${NC}] Incompatible Ubuntu version $VERSION_CODENAME detected!"
-        exit 1
-        ;;
-    esac
-  else
-    echo -e " ↳ [${RED}✗${NC}] No /etc/os-release on your system. Make sure you're running on Ubuntu, or similar!"
-    exit 1
-  fi
-
-else
-  echo -e " ↳ [${RED}✗${NC}] OS type $OSTYPE not supported!"
-  exit 1
-fi