languages: Add runnable support for bash (zed-industries#48807)

Bash:
<img width="469" height="149" alt="bash"
src="https://github.com/user-attachments/assets/179c9157-58b4-49a3-a166-78486eee5334"
/>

Bash output:
<img width="319" height="77" alt="bash_output"
src="https://github.com/user-attachments/assets/2f5f6582-8538-4508-81cc-84007779d359"
/>

Zsh:
<img width="414" height="139" alt="zsh"
src="https://github.com/user-attachments/assets/23cbb61c-6af1-4956-91a6-39d00319d4fc"
/>

Zsh output:
<img width="326" height="69" alt="zsh_output"
src="https://github.com/user-attachments/assets/beb76f68-fb0c-4140-91ea-bf66a50294fc"
/>

Dash:
<img width="343" height="121" alt="dash"
src="https://github.com/user-attachments/assets/47f44fda-2130-4076-9f65-12c5b1094a53"
/>

Dash output:
<img width="343" height="75" alt="dash_output"
src="https://github.com/user-attachments/assets/176459a2-9dd7-4bd9-8a3d-a7fe39d3b7c3"
/>

- [x] Code Reviewed
- [x] Manual QA

Release Notes:

- Added runnable support for bash.

Co-authored-by: ozacod <ozacod@users.noreply.github.com>

Author: ozacod

crates/languages/src/bash.rs

@@ -11,6 +11,7 @@ pub(super) fn bash_task_context() -> ContextProviderWithTasks {
         TaskTemplate {
             label: format!("run '{}'", VariableName::File.template_value()),
             command: VariableName::File.template_value(),
+            tags: vec!["bash-script".to_owned()],
             ..TaskTemplate::default()
         },
     ]))

crates/languages/src/bash/runnables.scm

@@ -0,0 +1,5 @@
+; Run bash scripts
+(
+  (program . (_) @run) @_bash-script
+  (#set! tag bash-script)
+)