Add option --binary

`--binary` allows to specify how to deal with binary content. Current
options are not printing anything or treating the binary data as text.

src/bin/bat/app.rs

@@ -9,6 +9,7 @@ use crate::{
     config::{get_args_from_config_file, get_args_from_env_opts_var, get_args_from_env_vars},
 };
 use bat::style::StyleComponentList;
+use bat::BinaryBehavior;
 use bat::StripAnsiMode;
 use clap::ArgMatches;
 
@@ -193,6 +194,11 @@ impl App {
                 Some("caret") => NonprintableNotation::Caret,
                 _ => unreachable!("other values for --nonprintable-notation are not allowed"),
             },
+            binary: match self.matches.get_one::<String>("binary").map(|s| s.as_str()) {
+                Some("as-text") => BinaryBehavior::AsText,
+                Some("no-printing") => BinaryBehavior::NoPrinting,
+                _ => unreachable!("other values for --binary are not allowed"),
+            },
             wrapping_mode: if self.interactive_output || maybe_term_width.is_some() {
                 if !self.matches.get_flag("chop-long-lines") {
                     match self.matches.get_one::<String>("wrap").map(|s| s.as_str()) {

src/bin/bat/clap_app.rs

@@ -77,6 +77,22 @@ pub fn build_app(interactive_output: bool) -> Command {
                     * caret   (^G, ^J, ^@, ..)",
                 ),
         )
+        .arg(
+            Arg::new("binary")
+                .long("binary")
+                .action(ArgAction::Set)
+                .default_value("no-printing")
+                .value_parser(["no-printing", "as-text"])
+                .value_name("behavior")
+                .hide_default_value(true)
+                .help("How to treat binary content. (default: no-printing)")
+                .long_help(
+                    "How to treat binary content. (default: no-printing)\n\n\
+                    Possible values:\n  \
+                    * no-printing: do not print any binary content\n  \
+                    * as-text: treat binary content as normal text",
+                ),
+        )
         .arg(
             Arg::new("plain")
                 .overrides_with("plain")