Box ShellError in Value::Error (#8375)

# Description

Our `ShellError` at the moment has a `std::mem::size_of<ShellError>` of
136 bytes (on AMD64). As a result `Value` directly storing the struct
also required 136 bytes (thanks to alignment requirements).

This change stores the `Value::Error` `ShellError` on the heap.

Pro:
- Value now needs just 80 bytes
- Should be 1 cacheline less (still at least 2 cachelines)

Con:
- More small heap allocations when dealing with `Value::Error`
  - More heap fragmentation
  - Potential for additional required memcopies

# Further code changes

Includes a small refactor of `try` due to a type mismatch in its large
match.

# User-Facing Changes

None for regular users.

Plugin authors may have to update their matches on `Value` if they use
`nu-protocol`

Needs benchmarking to see if there is a benefit in real world workloads.
**Update** small improvements in runtime for workloads with high volume
of values. Significant reduction in maximum resident set size, when many
values are held in memory.

# Tests + Formatting

crates/nu-command/src/formats/from/json.rs

@@ -77,7 +77,9 @@ impl Command for FromJson {
                     } else {
                         match convert_string_to_value(x.to_string(), span) {
                             Ok(v) => Some(v),
-                            Err(error) => Some(Value::Error { error }),
+                            Err(error) => Some(Value::Error {
+                                error: Box::new(error),
+                            }),
                         }
                     }
                 })
@@ -119,12 +121,12 @@ fn convert_nujson_to_value(value: &nu_json::Value, span: Span) -> Value {
         nu_json::Value::U64(u) => {
             if *u > i64::MAX as u64 {
                 Value::Error {
-                    error: ShellError::CantConvert {
+                    error: Box::new(ShellError::CantConvert {
                         to_type: "i64 sized integer".into(),
                         from_type: "value larger than i64".into(),
                         span,
                         help: None,
-                    },
+                    }),
                 }
             } else {
                 Value::Int {

crates/nu-command/src/formats/from/ods.rs

@@ -93,7 +93,7 @@ fn collect_binary(input: PipelineData, span: Span) -> Result<Vec<u8>, ShellError
             Some(Value::Binary { val: b, .. }) => {
                 bytes.extend_from_slice(&b);
             }
-            Some(Value::Error { error }) => return Err(error),
+            Some(Value::Error { error }) => return Err(*error),
             Some(x) => {
                 return Err(ShellError::UnsupportedInput(
                     "Expected binary from pipeline".to_string(),