Add shell type to shell integration details in terminal tab hover

[Copilot]

This change adds the shell type information to the shell integration details shown in terminal tab hover tooltips when detailed view is enabled.

Before

When hovering over a terminal tab with shell integration enabled, the detailed tooltip showed:

Shell integration: Rich

- Seen sequences: `A`, `B`, `C`
- Prompt type: `PS1`
- Prompt input: `ls -la`

After

Now the shell type is included at the beginning of the detailed additions:

Shell integration: Rich

- Shell type: `bash`
- Seen sequences: `A`, `B`, `C`
- Prompt type: `PS1`
- Prompt input: `ls -la`

Implementation

• Added a conditional check for instance.shellType in the refreshShellIntegrationInfoStatus function
• Uses the same formatting pattern as other detailed additions: Shell type: \${shellType}``
• Positioned at the beginning of the detailed additions list for logical grouping
• Gracefully handles cases where shell type is undefined

The shell type will display values like bash, zsh, pwsh, fish, cmd, etc., providing users with clear visibility into what shell is being used in each terminal.

Fixes #253052.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• electronjs.org
  • Triggering command: node-gyp (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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