docs: Add a few symbols that had been left out

Author: hpjansson

docs/chafa-docs.xml

@@ -82,6 +82,11 @@
     <xi:include href="xml/api-index-1.16.xml"><xi:fallback /></xi:include>
   </index>
 
+  <index id="new-api-index-1.18">
+    <title>Index of new API in version 1.18</title>
+    <xi:include href="xml/api-index-1.18.xml"><xi:fallback /></xi:include>
+  </index>
+
   <index id="api-index-deprecated">
     <title>Index of deprecated API</title>
     <xi:include href="xml/api-index-deprecated.xml"><xi:fallback /></xi:include>

docs/chafa-sections.txt

@@ -125,6 +125,7 @@ CHAFA_VERSION_1_10
 CHAFA_VERSION_1_12
 CHAFA_VERSION_1_14
 CHAFA_VERSION_1_16
+CHAFA_VERSION_1_18
 ChafaPixelType
 chafa_calc_canvas_geometry
 </SECTION>
@@ -251,6 +252,9 @@ chafa_term_info_emit_enable_alt_screen
 chafa_term_info_emit_disable_alt_screen
 chafa_term_info_emit_begin_tmux_passthrough
 chafa_term_info_emit_end_tmux_passthrough
+chafa_term_info_emit_begin_hyperlink
+chafa_term_info_emit_begin_hyperlink_anchor
+chafa_term_info_emit_end_hyperlink
 chafa_term_info_emit_return_key
 chafa_term_info_emit_backspace_key
 chafa_term_info_emit_delete_key