feat: add process module with arguments and allArguments static methods

- Introduce new 'process' module exposing a Process class with foreign static methods for accessing command-line arguments.
- Implement processSetArguments in main.c to store argc/argv, and processAllArguments in process.c to return them as a Wren list.
- Add --help flag support to CLI, printing usage with optional arguments.
- Include documentation for Process.arguments and Process.allArguments, plus module index and template updates.
- Register process module in modules.c and add Xcode project references for new source files.
- Add test scripts for allArguments and arguments, verifying list type, count, and expected values.

src/module/process.c

@@ -0,0 +1,23 @@
+#include "process.h"
+#include "wren.h"
+
+int numArgs;
+const char** args;
+
+void processSetArguments(int argc, const char* argv[])
+{
+  numArgs = argc;
+  args = argv;
+}
+
+void processAllArguments(WrenVM* vm)
+{
+  wrenEnsureSlots(vm, 2);
+  wrenSetSlotNewList(vm, 0);
+
+  for (int i = 0; i < numArgs; i++)
+  {
+    wrenSetSlotString(vm, 1, args[i]);
+    wrenInsertInList(vm, 0, -1, 1);
+  }
+}

src/module/process.h

@@ -0,0 +1,9 @@
+#ifndef process_h
+#define process_h
+
+#include "wren.h"
+
+// Stores the command line arguments passed to the CLI.
+void processSetArguments(int argc, const char* argv[]);
+
+#endif

src/module/process.wren

@@ -0,0 +1,6 @@
+class Process {
+  // TODO: This will need to be smarter when wren supports CLI options.
+  static arguments { allArguments[2..-1] }
+
+  foreign static allArguments
+}

src/module/process.wren.inc

@@ -0,0 +1,7 @@
+// Generated automatically from src/module/process.wren. Do not edit.
+static const char* processModuleSource =
+"class Process {\n"
+"  static arguments { allArguments[2..-1] }\n"
+"\n"
+"  foreign static allArguments\n"
+"}\n";