Add ini files highlighter

Now it's used for .repo, .socket, .target, .service and .ini files

rc/ini.kak

@@ -0,0 +1,19 @@
+hook global BufCreate .*\.(repo|service|target|socket|ini) %{
+    set buffer filetype ini-file
+}
+
+addhl -group / regions -default code ini-highlighter \
+    comment (^|\h)\K\# $ ''
+
+addhl -group /ini-highlighter/code regex "^\h*\[[^\]]*\]" 0:title
+addhl -group /ini-highlighter/code regex "^\h*([^\[][^=\n]*=)([^\n]*)" 1:identifier 2:value
+
+addhl -group /ini-highlighter/comment fill comment
+
+hook global WinSetOption filetype=ini-file %{
+    addhl ref ini-highlighter
+}
+
+hook global WinSetOption filetype=(?!ini-file).* %{
+    rmhl ini-highlighter
+}