glib: Bind g_unichar APIs

Some notes:
* names were made "rustier", e.g.:` g_unichar_istitle` became
`is_titlecase`
* I did not include APIs that were already availabe through Rust's char

glib/Gir.toml

@@ -31,6 +31,7 @@ generate = [
     "GLib.SpawnFlags",
     "GLib.Time",
     "GLib.TimeType",
+    "GLib.UnicodeType",
     "GLib.UriError",
     "GLib.UriFlags",
     "GLib.UriHideFlags",
@@ -513,6 +514,9 @@ status = "generate"
     name = "variant_get_gtype"
     # get_type() function that should be used in StaticType impl instead
     ignore = true
+    [[object.function]]
+    pattern = "unichar_((break_)?type|get_(script|mirror_char)|combining_class|is(mark|graph|punct|title|defined|wide(_cjk)?|zerowidth)|totitle|(fully_)?decompose|compose)"
+    manual = true # defined as extension methods on char
 
 [[object]]
 name = "GLib.Checksum"
@@ -771,6 +775,13 @@ concurrency = "send+sync"
     # in-out parameter
     manual = true
 
+[[object]]
+name = "GLib.UnicodeBreakType"
+status = "generate"
+    [[object.member]]
+    name = "close_paranthesis"
+    ignore = true
+
 [[object]]
 name = "GLib.UnicodeScript"
 status = "generate"