rgs: added multiline window limit and in-file result indexing (work in progress)

crates/core/flags/complete/rg.zsh

@@ -96,6 +96,8 @@ _rg() {
     + '(file-name)' # File-name options
     {-H,--with-filename}'[show file name for matches]'
     {-I,--no-filename}"[don't show file name for matches]"
+    '--in-file-index[show per-file match index in output]'
+    '--no-in-file-index[hide per-file match index in output]'
 
     + '(file-system)' # File system options
     "--one-file-system[don't descend into directories on other file systems]"
@@ -210,6 +212,7 @@ _rg() {
 
     + '(multiline)' # Multiline options
     {-U,--multiline}'[permit matching across multiple lines]'
+    '--multiline-window=[limit multiline matches to NUM lines (with -U)]:number of lines'
     $no'(multiline-dotall)--no-multiline[restrict matches to at most one line each]'
 
     + '(multiline-dotall)' # Multiline DOTALL options