docs: Move the GUuid SECTION

Move it to a separate page as there’s no public struct to hang the
docs off.

Signed-off-by: Philip Withnall <pwithnall@gnome.org>

Helps: #3037

docs/reference/glib/glib.toml.in

@@ -69,6 +69,7 @@ content_files = [
   "base64.md",
   "goption.md",
   "data-structures.md",
+  "uuid.md",
   "unicode.md",
 
   "threads-deprecated.md",

docs/reference/glib/meson.build

@@ -169,6 +169,7 @@ expand_content_files = [
   'goption.md',
   'data-structures.md',
   'unicode.md',
+  'uuid.md',
 ]
 
 glib_toml = configure_file(input: 'glib.toml.in', output: 'glib.toml', configuration: toml_conf)

docs/reference/glib/uuid.md

@@ -0,0 +1,25 @@
+Title: GUuid
+SPDX-License-Identifier: LGPL-2.1-or-later
+SPDX-FileCopyrightText: 2017 Bastien Nocera
+SPDX-FileCopyrightText: 2017 Marc-André Lureau
+
+# GUuid
+
+A UUID, or Universally unique identifier, is intended to uniquely
+identify information in a distributed environment. For the
+definition of UUID, see [RFC 4122](https://tools.ietf.org/html/rfc4122.html).
+
+The creation of UUIDs does not require a centralized authority.
+
+UUIDs are of relatively small size (128 bits, or 16 bytes). The
+common string representation (ex:
+`1d6c0810-2bd6-45f3-9890-0268422a6f14`) needs 37 bytes.
+[func@GLib.uuid_string_is_valid] can be used to check whether a string is a
+valid UUID.
+
+The UUID specification defines 5 versions, and calling
+[func@GLib.uuid_string_random] will generate a unique (or rather random)
+UUID of the most common version, version 4.
+
+UUID support was added to GLib in version 2.52.
+

glib/guuid.c

@@ -35,28 +35,6 @@ typedef struct {
   guint8 bytes[16];
 } GUuid;
 
-/**
- * SECTION:uuid
- * @title: GUuid
- * @short_description: a universally unique identifier
- *
- * A UUID, or Universally unique identifier, is intended to uniquely
- * identify information in a distributed environment. For the
- * definition of UUID, see [RFC 4122](https://tools.ietf.org/html/rfc4122.html).
- *
- * The creation of UUIDs does not require a centralized authority.
- *
- * UUIDs are of relatively small size (128 bits, or 16 bytes). The
- * common string representation (ex:
- * 1d6c0810-2bd6-45f3-9890-0268422a6f14) needs 37 bytes.
- *
- * The UUID specification defines 5 versions, and calling
- * g_uuid_string_random() will generate a unique (or rather random)
- * UUID of the most common version, version 4.
- *
- * Since: 2.52
- */
-
 /*
  * g_uuid_to_string:
  * @uuid: a #GUuid