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.

doc/site/modules/index.markdown

@@ -44,6 +44,6 @@ applications that want to embed Wren.
 [libuv]: http://libuv.org
 
 * [io](io)
-* [process](process)
+* [os](os)
 * [scheduler](scheduler)
 * [timer](timer)

doc/site/modules/os/index.markdown

@@ -0,0 +1,7 @@
+^title Module "os"
+
+The os module exposes classes for accessing capabilities provided by the
+underlying operating system.
+
+* [Platform](platform.html)
+* [Process](process.html)

doc/site/modules/os/platform.markdown

@@ -0,0 +1,26 @@
+^title Platform Class
+
+The Platform class exposes basic information about the operating system Wren is
+running on top of.
+
+## Static Methods
+
+### **name**
+
+The name of the platform. This roughly describes the operating system, and is
+usually one of:
+
+* "iOS"
+* "Linux"
+* "OS X"
+* "POSIX"
+* "Unix"
+* "Windows"
+
+If Wren was compiled for an unknown operating system, returns "Unknown".
+
+### **isPosix**
+
+Returns `true` if the host operating system is known to support the POSIX
+standard. This is true for Linux and other Unices, as well as the various Apple
+operating systems.

doc/site/modules/os/process.markdown

@@ -1,6 +1,6 @@
 ^title Process Class
 
-The Process class lets you work with operating processes, including the
+The Process class lets you work with operating system processes, including the
 currently running one.
 
 ## Static Methods

doc/site/modules/os/template.html

@@ -22,11 +22,12 @@
   <nav class="big">
     <ul>
       <li><a href="../">Modules</a></li>
-      <li><a href="./">process</a></li>
+      <li><a href="./">os</a></li>
     </ul>
     <section>
-      <h2>process classes</h2>
+      <h2>os classes</h2>
       <ul>
+        <li><a href="platform.html">Platform</a></li>
         <li><a href="process.html">Process</a></li>
       </ul>
     </section>
@@ -35,14 +36,15 @@
     <table>
       <tr>
         <td><a href="../">Modules</a></td>
-        <td><a href="./">process</a></td>
+        <td><a href="./">os</a></td>
       </tr>
       <tr>
-        <td colspan="2"><h2>process classes</h2></td>
+        <td colspan="2"><h2>os classes</h2></td>
       </tr>
       <tr>
         <td>
           <ul>
+            <li><a href="platform.html">Platform</a></li>
             <li><a href="process.html">Process</a></li>
           </ul>
         </td>

doc/site/modules/process/index.markdown

@@ -1,5 +0,0 @@
-^title Module "process"
-
-The process module exposes a single class for working with operating processes.
-
-* [Process](process.html)

doc/site/modules/template.html

@@ -37,7 +37,7 @@
       <h2>cli</h2>
       <ul>
         <li><a href="io">io</a></li>
-        <li><a href="process">process</a></li>
+        <li><a href="os">os</a></li>
         <li><a href="scheduler">scheduler</a></li>
         <li><a href="timer">timer</a></li>
       </ul>
@@ -65,7 +65,7 @@
         <td>
           <ul>
             <li><a href="io">io</a></li>
-            <li><a href="process">process</a></li>
+            <li><a href="os">os</a></li>
             <li><a href="scheduler">scheduler</a></li>
             <li><a href="timer">timer</a></li>
           </ul>