fix: improve Windows compatibility for CLI commands and sandbox (#261)

## Fix Windows compatibility issues (#248)

This PR addresses the Windows compatibility issues reported in #248:

1. **Fix sandbox initialization failure on Windows**
- Modified `getSandbox()` to return `SandboxType.NONE` on Windows
instead of throwing an error
- Added a warning log message to inform the user that sandbox is not
available on Windows

2. **Fix Unix commands not working on Windows**
- Created a new module
[platform-commands.ts](cci:7://file:///c:/Users/HP%20840%20G6/workflow/codex/codex-cli/src/utils/agent/platform-commands.ts:0:0-0:0)
that automatically adapts Unix commands to their Windows equivalents
   - Implemented a mapping table for common commands and their options
   - Integrated this functionality into the command execution process

### Testing
Tested on Windows 10 with the following commands:
- `ls -R .` (now automatically translates to `dir /s .`)
- Other Unix commands like `grep`, `cat`, etc.

The CLI no longer crashes when running these commands on Windows.

I have read the CLA Document and I hereby sign the CLA

---------

Signed-off-by: Alpha Diop <alphakhoss@gmail.com>

codex-cli/src/utils/agent/platform-commands.ts

@@ -0,0 +1,86 @@
+/**
+ * Utility functions for handling platform-specific commands
+ */
+
+import { log, isLoggingEnabled } from "./log.js";
+
+/**
+ * Map of Unix commands to their Windows equivalents
+ */
+const COMMAND_MAP: Record<string, string> = {
+  ls: "dir",
+  grep: "findstr",
+  cat: "type",
+  rm: "del",
+  cp: "copy",
+  mv: "move",
+  touch: "echo.>",
+  mkdir: "md",
+};
+
+/**
+ * Map of common Unix command options to their Windows equivalents
+ */
+const OPTION_MAP: Record<string, Record<string, string>> = {
+  ls: {
+    "-l": "/p",
+    "-a": "/a",
+    "-R": "/s",
+  },
+  grep: {
+    "-i": "/i",
+    "-r": "/s",
+  },
+};
+
+/**
+ * Adapts a command for the current platform.
+ * On Windows, this will translate Unix commands to their Windows equivalents.
+ * On Unix-like systems, this will return the original command.
+ *
+ * @param command The command array to adapt
+ * @returns The adapted command array
+ */
+export function adaptCommandForPlatform(command: Array<string>): Array<string> {
+  // If not on Windows, return the original command
+  if (process.platform !== "win32") {
+    return command;
+  }
+
+  // Nothing to adapt if the command is empty
+  if (command.length === 0) {
+    return command;
+  }
+
+  const cmd = command[0];
+
+  // If cmd is undefined or the command doesn't need adaptation, return it as is
+  if (!cmd || !COMMAND_MAP[cmd]) {
+    return command;
+  }
+
+  if (isLoggingEnabled()) {
+    log(`Adapting command '${cmd}' for Windows platform`);
+  }
+
+  // Create a new command array with the adapted command
+  const adaptedCommand = [...command];
+  adaptedCommand[0] = COMMAND_MAP[cmd];
+
+  // Adapt options if needed
+  const optionsForCmd = OPTION_MAP[cmd];
+  if (optionsForCmd) {
+    for (let i = 1; i < adaptedCommand.length; i++) {
+      const option = adaptedCommand[i];
+      if (option && optionsForCmd[option]) {
+        adaptedCommand[i] = optionsForCmd[option];
+      }
+    }
+  }
+
+  if (isLoggingEnabled()) {
+    log(`Adapted command: ${adaptedCommand.join(" ")}`);
+  }
+
+  return adaptedCommand;
+}