[var] Deprecated axis enumeration API and add new version

New version has axis flags.

New API:
+hb_ot_var_axis_info_t
+hb_ot_var_find_axis_info()
+hb_ot_var_get_axis_infos()

Deprecated API:
-HB_OT_VAR_NO_AXIS_INDEX
-hb_ot_var_axis_t
-hb_ot_var_find_axis()
-hb_ot_var_get_axes()
diff --git a/docs/harfbuzz-sections.txt b/docs/harfbuzz-sections.txt
index 63d5f6c..5f5dcef 100644
--- a/docs/harfbuzz-sections.txt
+++ b/docs/harfbuzz-sections.txt
@@ -161,6 +161,10 @@
 hb_ot_layout_table_find_script
 hb_ot_tag_from_language
 hb_ot_tags_from_script
+HB_OT_VAR_NO_AXIS_INDEX
+hb_ot_var_axis_t
+hb_ot_var_find_axis
+hb_ot_var_get_axes
 hb_set_invert
 hb_unicode_eastasian_width_func_t
 hb_unicode_eastasian_width
@@ -581,14 +585,12 @@
 HB_OT_TAG_VAR_AXIS_SLANT
 HB_OT_TAG_VAR_AXIS_WEIGHT
 HB_OT_TAG_VAR_AXIS_WIDTH
-HB_OT_VAR_NO_AXIS_INDEX
-hb_ot_var_axis_t
 hb_ot_var_has_data
-hb_ot_var_find_axis
-hb_ot_var_get_axis_count
-hb_ot_var_get_axes
 hb_ot_var_axis_flags_t
-hb_ot_var_axis_get_flags
+hb_ot_var_axis_info_t
+hb_ot_var_find_axis_info
+hb_ot_var_get_axis_count
+hb_ot_var_get_axis_infos
 hb_ot_var_get_named_instance_count
 hb_ot_var_named_instance_get_subfamily_name_id
 hb_ot_var_named_instance_get_postscript_name_id