du: add -l/--long flag, remove -a/--all flag (#14407)

# Description
Closes:  #14387 
~To make it happen, just need to added `-l` flag to `du`, and pass it to
`DirBuilder`, `DirInfo`, `FileInfo`
Then tweak `impl From<DirInfo> for Value` and `impl From<FileInfo> for
Value` impl.~

---

Edit: this PR is going to:
1. Exclude directories and files columns by default
2. Added `-l/--long` flag to output directories and files columns
3. When running `du`, it will output the files as well. Previously it
doesn't output the size of file.

To make it happen, just need to added `-r` flag to `du`, and pass it to
`DirBuilder`, `DirInfo`, `FileInfo`
Then tweak `impl From<DirInfo> for Value` and `impl From<FileInfo> for
Value` impl.

And rename some variables.

# User-Facing Changes
`du` is no longer output `directories` and `file` columns by default,
added `-r` flag will show `directories` column, `-f` flag will show
`files` column.

```nushell
> du nushell
╭───┬────────────────────────────────────┬──────────┬──────────╮
│ # │                path                │ apparent │ physical │
├───┼────────────────────────────────────┼──────────┼──────────┤
│ 0 │ /home/windsoilder/projects/nushell │ 34.6 GiB │ 34.7 GiB │
├───┼────────────────────────────────────┼──────────┼──────────┤
│ # │                path                │ apparent │ physical │
╰───┴────────────────────────────────────┴──────────┴──────────╯
> du nushell --recursive --files # It outputs two more columns, `directories` and `files`, but the output is too long to paste here.
```
# Tests + Formatting
Added 1 test

# After Submitting
NaN

crates/nu-command/src/filesystem/du.rs

@@ -12,8 +12,8 @@ pub struct Du;
 #[derive(Deserialize, Clone, Debug)]
 pub struct DuArgs {
     path: Option<Spanned<NuGlob>>,
-    all: bool,
     deref: bool,
+    long: bool,
     exclude: Option<Spanned<NuGlob>>,
     #[serde(rename = "max-depth")]
     max_depth: Option<Spanned<i64>>,
@@ -49,6 +49,11 @@ impl Command for Du {
                 "Dereference symlinks to their targets for size",
                 Some('r'),
             )
+            .switch(
+                "long",
+                "Get underlying directories and files for each entry",
+                Some('l'),
+            )
             .named(
                 "exclude",
                 SyntaxShape::GlobPattern,
@@ -94,8 +99,8 @@ impl Command for Du {
                 });
             }
         }
-        let all = call.has_flag(engine_state, stack, "all")?;
         let deref = call.has_flag(engine_state, stack, "deref")?;
+        let long = call.has_flag(engine_state, stack, "long")?;
         let exclude = call.get_flag(engine_state, stack, "exclude")?;
         #[allow(deprecated)]
         let current_dir = current_dir(engine_state, stack)?;
@@ -111,8 +116,8 @@ impl Command for Du {
             None => {
                 let args = DuArgs {
                     path: None,
-                    all,
                     deref,
+                    long,
                     exclude,
                     max_depth,
                     min_size,
@@ -127,8 +132,8 @@ impl Command for Du {
                 for p in paths {
                     let args = DuArgs {
                         path: Some(p),
-                        all,
                         deref,
+                        long,
                         exclude: exclude.clone(),
                         max_depth,
                         min_size,
@@ -174,7 +179,6 @@ fn du_for_one_pattern(
             })
     })?;
 
-    let include_files = args.all;
     let mut paths = match args.path {
         Some(p) => nu_engine::glob_from(&p, current_dir, span, None),
         // The * pattern should never fail.
@@ -188,17 +192,10 @@ fn du_for_one_pattern(
             None,
         ),
     }
-    .map(|f| f.1)?
-    .filter(move |p| {
-        if include_files {
-            true
-        } else {
-            matches!(p, Ok(f) if f.is_dir())
-        }
-    });
+    .map(|f| f.1)?;
 
-    let all = args.all;
     let deref = args.deref;
+    let long = args.long;
     let max_depth = args.max_depth.map(|f| f.item as u64);
     let min_size = args.min_size.map(|f| f.item as u64);
 
@@ -207,7 +204,7 @@ fn du_for_one_pattern(
         min: min_size,
         deref,
         exclude,
-        all,
+        long,
     };
 
     let mut output: Vec<Value> = vec![];
@@ -216,7 +213,7 @@ fn du_for_one_pattern(
             Ok(a) => {
                 if a.is_dir() {
                     output.push(DirInfo::new(a, &params, max_depth, span, signals)?.into());
-                } else if let Ok(v) = FileInfo::new(a, deref, span) {
+                } else if let Ok(v) = FileInfo::new(a, deref, span, params.long) {
                     output.push(v.into());
                 }
             }