feat: remove curly braces with fmt (#4529)

# Description

## Problem\*

Resolves
https://github.com/noir-lang/noir/compare/master...Andy53:noir:fmt_remvoes_curly_braces_when_there_is_a_single_import?expand=1

Closes #4480 

## Summary\*
Removes curly braces from imports when there is only a single import.

`use dep::std::hash::{sha256};`
 
becomes:
`use dep::std::hash::sha256;


## Additional Context



## Documentation\*

Check one:
- [ X] No documentation needed.
- [ ] Documentation included in this PR.
- [ ] **[Exceptional Case]** Documentation to be submitted in a separate
PR.

# PR Checklist\*

- [ X] I have tested the changes locally.
- [ ] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.

---------

Co-authored-by: jfecher <jfecher11@gmail.com>

noir_stdlib/src/array.nr

@@ -1,4 +1,4 @@
-use crate::cmp::{Ord};
+use crate::cmp::Ord;
 
 // TODO: Once we fully move to the new SSA pass this module can be removed and replaced
 // by the methods in the `slice` module

tooling/nargo_fmt/src/rewrite/imports.rs

@@ -102,7 +102,14 @@ impl UseTree {
 
         let mut iter = self.path.iter().peekable();
         while let Some(segment) = iter.next() {
-            let segment_str = segment.rewrite(visitor, shape);
+            let mut segment_str = segment.rewrite(visitor, shape);
+            if segment_str.contains('{')
+                && !segment_str.contains(',')
+                && !segment_str.contains("::")
+            {
+                let empty = "";
+                segment_str = segment_str.replace(['{', '}'], empty);
+            }
             result.push_str(&segment_str);
 
             if iter.peek().is_some() {

tooling/nargo_fmt/tests/expected/contract.nr

@@ -11,7 +11,7 @@ contract Benchmarking {
         context::Context, note::{note_getter_options::NoteGetterOptions, note_header::NoteHeader},
         log::emit_unencrypted_log, state_vars::{Map, PublicMutable, PrivateSet},
         types::type_serialization::field_serialization::{FieldSerializationMethods, FIELD_SERIALIZED_LEN},
-        types::address::{AztecAddress}
+        types::address::AztecAddress
     };
 
     struct Storage {

tooling/nargo_fmt/tests/expected/import_braces.nr

@@ -0,0 +1 @@
+use dep::std::hash::sha256;

tooling/nargo_fmt/tests/input/contract.nr

@@ -11,7 +11,7 @@ contract Benchmarking {
         context::Context, note::{note_getter_options::NoteGetterOptions, note_header::NoteHeader},
         log::emit_unencrypted_log, state_vars::{Map, PublicMutable, PrivateSet},
         types::type_serialization::field_serialization::{FieldSerializationMethods, FIELD_SERIALIZED_LEN},
-        types::address::{AztecAddress}
+        types::address::AztecAddress
     };
 
     struct Storage {

tooling/nargo_fmt/tests/input/import_braces.nr

@@ -0,0 +1 @@
+use dep::std::hash::{sha256};