Auto-Completion: put ` tildes around filenames with parentheses (#7712)

# Description

Fixes: #7706

# User-Facing Changes


![img](https://user-images.githubusercontent.com/22256154/211286663-3d07a650-5e2d-406e-99f6-cff90dba352b.png)


# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.

Co-authored-by: Stefan Holderbach <sholderbach@users.noreply.github.com>

crates/nu-cli/src/completions/file_completions.rs

@@ -146,6 +146,8 @@ pub fn file_path_completion(
                             || path.contains('"')
                             || path.contains(' ')
                             || path.contains('#')
+                            || path.contains('(')
+                            || path.contains(')')
                         {
                             path = format!("`{}`", path);
                         }

crates/nu-cli/tests/completions.rs

@@ -444,6 +444,7 @@ fn file_completion_quoted() {
         "`te st.txt`".to_string(),
         "`te#st.txt`".to_string(),
         "`te'st.txt`".to_string(),
+        "`te(st).txt`".to_string(),
     ];
 
     match_suggestions(expected_paths, suggestions)