make date humanize use human_time_from_now() (#15918)

# Description

This PR fixes a `date humanize` bug and makes it use @LoicRiegel's newer
function `human_time_from_now()`.

### Before
```nushell
❯ (date now) + 3day
Wed, 11 Jun 2025 07:15:48 -0500 (in 3 days)
❯ (date now) + 3day | date humanize
in 2 days
```

### After
```nushell
❯ (date now) + 3day
Wed, 11 Jun 2025 07:23:10 -0500 (in 3 days)
❯ (date now) + 3day | date humanize
in 3 days
```

Closes #15916


# User-Facing Changes
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crates/nu-command/src/date/humanize.rs

@@ -1,6 +1,5 @@
 use crate::date::utils::parse_date_from_string;
 use chrono::{DateTime, FixedOffset, Local};
-use chrono_humanize::HumanTime;
 use nu_engine::command_prelude::*;
 
 #[derive(Clone)]
@@ -90,7 +89,7 @@ fn helper(value: Value, head: Span) -> Value {
 }
 
 fn humanize_date(dt: DateTime<FixedOffset>) -> String {
-    HumanTime::from(dt).to_string()
+    nu_protocol::human_time_from_now(&dt).to_string()
 }
 
 #[cfg(test)]

crates/nu-protocol/src/value/mod.rs

@@ -4078,7 +4078,7 @@ fn operator_type_error(
     }
 }
 
-fn human_time_from_now(val: &DateTime<FixedOffset>) -> HumanTime {
+pub fn human_time_from_now(val: &DateTime<FixedOffset>) -> HumanTime {
     let now = Local::now().with_timezone(val.offset());
     let delta = *val - now;
     match delta.num_nanoseconds() {