feat: rename process module to os and add Platform class with name and isPosix methods

Rename the "process" module to "os" across all source files, documentation, tests, and build configuration. Add a new Platform class to the os module with static methods `name` (returns OS string like "Windows", "Linux", "OS X", "iOS", "Unix", "POSIX", or "Unknown") and `isPosix` (returns bool indicating POSIX compliance). Update all import paths from "process" to "os" in test files and module registrations. Move process.c/h to os.c/h, rename processSetArguments to osSetArguments, and regenerate the os.wren.inc bytecode source. Add documentation pages for the os module and Platform class.

src/module/os.c

@@ -0,0 +1,71 @@
+#include "os.h"
+#include "wren.h"
+
+#if __APPLE__
+  #include "TargetConditionals.h"
+#endif
+
+int numArgs;
+const char** args;
+
+void osSetArguments(int argc, const char* argv[])
+{
+  numArgs = argc;
+  args = argv;
+}
+
+void platformName(WrenVM* vm)
+{
+  wrenEnsureSlots(vm, 1);
+  
+  #ifdef _WIN32
+    wrenSetSlotString(vm, 0, "Windows");
+  #elif __APPLE__
+    #if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
+      wrenSetSlotString(vm, 0, "iOS");
+    #elif TARGET_OS_MAC
+      wrenSetSlotString(vm, 0, "OS X");
+    #else
+      wrenSetSlotString(vm, 0, "Unknown");
+    #endif
+  #elif __linux__
+    wrenSetSlotString(vm, 0, "Linux");
+  #elif __unix__
+    wrenSetSlotString(vm, 0, "Unix");
+  #elif defined(_POSIX_VERSION)
+    wrenSetSlotString(vm, 0, "POSIX");
+  #else
+    wrenSetSlotString(vm, 0, "Unknown");
+  #endif
+}
+
+void platformIsPosix(WrenVM* vm)
+{
+  wrenEnsureSlots(vm, 1);
+  
+  #ifdef _WIN32
+    wrenSetSlotBool(vm, 0, false);
+  #elif __APPLE__
+    wrenSetSlotBool(vm, 0, true);
+  #elif __linux__
+    wrenSetSlotBool(vm, 0, true);
+  #elif __unix__
+    wrenSetSlotBool(vm, 0, true);
+  #elif defined(_POSIX_VERSION)
+    wrenSetSlotBool(vm, 0, true);
+  #else
+    wrenSetSlotString(vm, 0, false);
+  #endif
+}
+
+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/os.h

@@ -4,6 +4,6 @@
 #include "wren.h"
 
 // Stores the command line arguments passed to the CLI.
-void processSetArguments(int argc, const char* argv[]);
+void osSetArguments(int argc, const char* argv[]);
 
 #endif

src/module/os.wren

@@ -1,3 +1,8 @@
+class Platform {
+  foreign static isPosix
+  foreign static name
+}
+
 class Process {
   // TODO: This will need to be smarter when wren supports CLI options.
   static arguments { allArguments[2..-1] }

src/module/os.wren.inc

@@ -0,0 +1,13 @@
+// Generated automatically from src/module/os.wren. Do not edit.
+static const char* osModuleSource =
+"class Platform {\n"
+"  foreign static isPosix\n"
+"  foreign static name\n"
+"}\n"
+"\n"
+"class Process {\n"
+"  // TODO: This will need to be smarter when wren supports CLI options.\n"
+"  static arguments { allArguments[2..-1] }\n"
+"\n"
+"  foreign static allArguments\n"
+"}\n";

src/module/process.c

@@ -1,23 +0,0 @@
-#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.wren.inc

@@ -1,7 +0,0 @@
-// 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";