[name] Make hb_name_id_t be the enum

This is like hb_script_t.

We had this exposed as unsigned int since 2.0.0 release in two APIs,
as well as hb_ot_layout_get_size_params() from earlier.
But since no one uses those (right?!), let's just fix this now.
diff --git a/docs/harfbuzz-docs.xml b/docs/harfbuzz-docs.xml
index 3488ccb..859cc70 100644
--- a/docs/harfbuzz-docs.xml
+++ b/docs/harfbuzz-docs.xml
@@ -76,11 +76,13 @@
         <xi:include href="xml/hb-set.xml"/>
 
         <xi:include href="xml/hb-ot.xml"/>
+        <xi:include href="xml/hb-ot-font.xml"/>
         <xi:include href="xml/hb-ot-layout.xml"/>
         <xi:include href="xml/hb-ot-tag.xml"/>
-        <xi:include href="xml/hb-ot-font.xml"/>
-        <xi:include href="xml/hb-ot-shape.xml"/>
+        <xi:include href="xml/hb-ot-color.xml"/>
+        <xi:include href="xml/hb-ot-name.xml"/>
         <xi:include href="xml/hb-ot-math.xml"/>
+        <xi:include href="xml/hb-ot-shape.xml"/>
 
         <xi:include href="xml/hb-shape-plan.xml"/>