vt: pass pointer options directly to terminal_set

Previously ghostty_terminal_set required all values to be passed as
pointers to the value, even when the value itself was already a
pointer (userdata, function pointer callbacks). This forced callers
into awkward patterns like compound literals or intermediate
variables just to take the address of a pointer.

Now pointer-typed options (userdata and all callbacks) are passed
directly as the value parameter. Only non-pointer types like
GhosttyString still require a pointer to the value. This
simplifies InType to return the actual stored type for each option
and lets setTyped work with those types directly.

include/ghostty/vt/terminal.h

@@ -341,7 +341,7 @@ typedef enum {
   /**
    * Opaque userdata pointer passed to all callbacks.
    *
-   * Input type: void**
+   * Input type: void*
    */
   GHOSTTY_TERMINAL_OPT_USERDATA = 0,
 
@@ -350,7 +350,7 @@ typedef enum {
    * to the pty (e.g. in response to a DECRQM query or device
    * status report). Set to NULL to ignore such sequences.
    *
-   * Input type: GhosttyTerminalWritePtyFn*
+   * Input type: GhosttyTerminalWritePtyFn
    */
   GHOSTTY_TERMINAL_OPT_WRITE_PTY = 1,
 
@@ -358,7 +358,7 @@ typedef enum {
    * Callback invoked when the terminal receives a BEL character
    * (0x07). Set to NULL to ignore bell events.
    *
-   * Input type: GhosttyTerminalBellFn*
+   * Input type: GhosttyTerminalBellFn
    */
   GHOSTTY_TERMINAL_OPT_BELL = 2,
 
@@ -366,7 +366,7 @@ typedef enum {
    * Callback invoked when the terminal receives an ENQ character
    * (0x05). Set to NULL to send no response.
    *
-   * Input type: GhosttyTerminalEnquiryFn*
+   * Input type: GhosttyTerminalEnquiryFn
    */
   GHOSTTY_TERMINAL_OPT_ENQUIRY = 3,
 
@@ -374,7 +374,7 @@ typedef enum {
    * Callback invoked when the terminal receives an XTVERSION query
    * (CSI > q). Set to NULL to report the default "libghostty" string.
    *
-   * Input type: GhosttyTerminalXtversionFn*
+   * Input type: GhosttyTerminalXtversionFn
    */
   GHOSTTY_TERMINAL_OPT_XTVERSION = 4,
 
@@ -383,7 +383,7 @@ typedef enum {
    * sequences (e.g. OSC 0 or OSC 2). Set to NULL to ignore title
    * change events.
    *
-   * Input type: GhosttyTerminalTitleChangedFn*
+   * Input type: GhosttyTerminalTitleChangedFn
    */
   GHOSTTY_TERMINAL_OPT_TITLE_CHANGED = 5,
 
@@ -391,7 +391,7 @@ typedef enum {
    * Callback invoked in response to XTWINOPS size queries
    * (CSI 14/16/18 t). Set to NULL to silently ignore size queries.
    *
-   * Input type: GhosttyTerminalSizeFn*
+   * Input type: GhosttyTerminalSizeFn
    */
   GHOSTTY_TERMINAL_OPT_SIZE = 6,
 
@@ -401,7 +401,7 @@ typedef enum {
    * to report the current scheme, or return false to silently ignore.
    * Set to NULL to ignore color scheme queries.
    *
-   * Input type: GhosttyTerminalColorSchemeFn*
+   * Input type: GhosttyTerminalColorSchemeFn
    */
   GHOSTTY_TERMINAL_OPT_COLOR_SCHEME = 7,
 
@@ -411,7 +411,7 @@ typedef enum {
    * pointer with response data, or return false to silently ignore.
    * Set to NULL to ignore device attributes queries.
    *
-   * Input type: GhosttyTerminalDeviceAttributesFn*
+   * Input type: GhosttyTerminalDeviceAttributesFn
    */
   GHOSTTY_TERMINAL_OPT_DEVICE_ATTRIBUTES = 8,
 
@@ -619,8 +619,10 @@ GhosttyResult ghostty_terminal_resize(GhosttyTerminal terminal,
  * Set an option on the terminal.
  *
  * Configures terminal callbacks and associated state such as the
- * write_pty callback and userdata pointer. A NULL value pointer
- * clears the option to its default (NULL/disabled).
+ * write_pty callback and userdata pointer. The value is passed
+ * directly for pointer types (callbacks, userdata) or as a pointer
+ * to the value for non-pointer types (e.g. GhosttyString*).
+ * NULL clears the option to its default.
  *
  * Callbacks are invoked synchronously during ghostty_terminal_vt_write().
  * Callbacks must not call ghostty_terminal_vt_write() on the same