refactor: update intro.1 man page

programs/man/intro.1

@@ -3,30 +3,19 @@
     intro - introduction to MontaukOS userspace
 
 .SH DESCRIPTION
-    MontaukOS is a hobbyist 64-bit operating system written in C++20,
-    currently at version 0.1.7 (API version 8). Userspace programs
+    MontaukOS is a 64-bit operating system written in C++20,
+    currently at version 0.2.0 (API version 11). Userspace programs
     run in Ring 3, are loaded as static ELF64 binaries, and
     communicate with the kernel through the x86-64 SYSCALL/SYSRET
-    mechanism (150 syscalls -- see syscalls(2)).
+    mechanism (roughly 190 syscall numbers, 0-189 - see syscalls(2)).
 
-    Programs are compiled with a freestanding cross-compiler and
-    linked at virtual address 0x400000. There is no standard C
-    library for C++ programs -- all system interaction goes through
-    the montauk:: syscall wrappers. A desktop environment with a
-    window server, GUI apps, and Bluetooth/audio/networking stacks
-    runs on top of the same syscall API.
+    Programs are built with the x86_64-montauk cross toolchain and
+    linked at virtual address 0x400000. MontaukOS has its own C
+    library along with the Montauk API (montauk:: wrappers).
 
 .SH GETTING STARTED
     To write a new system/CLI program, create a directory under
-    programs/src/ with a main.cpp file. The entry point is:
-
-        extern "C" void _start() { ... }
-
-    There is no argc/argv. Use montauk::getargs() to retrieve any
-    arguments passed by the parent process. Include <montauk/syscall.h>
-    for the full typed syscall API. GUI apps additionally use
-    win_create()/win_poll()/win_present() from montauk/Window.hpp
-    (see framebuffer(2)).
+    programs/src/ with a main.cpp file.
 
     Build with:
 
@@ -39,15 +28,12 @@
     The boot ramdisk is mounted as drive 0 with the following
     directory structure:
 
-        0:/os/          System/CLI binaries (shell, init, man, etc.),
-                        plus os-owned data: certs/, firmware/,
-                        licenses/, wallpapers/
-        0:/apps/        GUI app bundles, one directory per app
-                        (<app>.elf + manifest.toml + icon)
+        0:/os/          System/CLI binaries, os data
+        0:/apps/        App bundles
         0:/config/      System-wide config TOMLs
-        0:/users/<name>/  Per-user home directories (created at
-                        login), with Music/, Videos/, Pictures/,
-                        config/ subdirectories
+        0:/users/<name>/ User home directories
+        0:/state/       Mutable system runtime state
+        0:/tmp/         Scratch space
         0:/fonts/       Shared fonts
         0:/icons/       Shared icons
         0:/man/         Manual pages
@@ -56,15 +42,12 @@
                         Lua, headers and libraries), when installed
         0:/boot/        Kernel, bootloader, ramdisk image
 
-    There is no 0:/games/, 0:/common/, 0:/home/, or 0:/etc/ --
-    these were used by earlier single-user releases and no longer
-    exist. 0:/lib/ was merged into 0:/sdk/. Games and other GUI
-    programs (including doom) ship as bundles under 0:/apps/.
-
 .SH SHELL
-    The interactive shell is the primary way to interact with
+    The interactive shell can be used to interact with
     MontaukOS. Commands are resolved against the current directory
-    first, then 0:/os/. Type 'help' at the shell prompt for a list
+    first, then 0:/os/.
+    
+    Type 'help' at the shell prompt for a list
     of commands. Use 'man shell' for detailed shell documentation.
 
 .SH MAN PAGES
@@ -77,6 +60,8 @@
         fetch(1)        HTTP client
         ping(1)         ICMP ping
         nslookup(1)     DNS lookup
+        wifi(1)         Wi-Fi configuration
+        sshd(1)         SSH daemon
         fontscale(1)    Terminal font scaling
         edit(1)         Text editor
         man(1)          The man command itself
@@ -90,6 +75,7 @@
         file(2)         File I/O syscalls
         framebuffer(2)  Framebuffer access
         malloc(3)       Memory allocation
+        rtlsdr(3)       RTL-SDR software radio API
 
 .SH SEE ALSO
     shell(1), syscalls(2), malloc(3)