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

crates/core/flags/lowargs.rs

@@ -65,6 +65,7 @@ pub(crate) struct LowArgs {
     pub(crate) ignore_file: Vec<PathBuf>,
     pub(crate) ignore_file_case_insensitive: bool,
     pub(crate) include_zero: bool,
+    pub(crate) in_file_index: bool,
     pub(crate) invert_match: bool,
     pub(crate) line_number: Option<bool>,
     pub(crate) logging: Option<LoggingMode>,
@@ -76,6 +77,7 @@ pub(crate) struct LowArgs {
     pub(crate) mmap: MmapMode,
     pub(crate) multiline: bool,
     pub(crate) multiline_dotall: bool,
+    pub(crate) multiline_window: Option<usize>,
     pub(crate) no_config: bool,
     pub(crate) no_ignore_dot: bool,
     pub(crate) no_ignore_exclude: bool,