[Terminal] Provide a command/action to open a new Terminal view (for keybinding and Quick Access)

[Philipp0205]

Problem

Currently, there is no Eclipse command (in the command/handler framework sense) to open a new Terminal view.
The only way to open a new terminal instance is via the monitor button inside the Terminal view itself.

This means:

• No keyboard shortcut can be bound to "Open New Terminal" via Preferences > General > Keys
• Quick Access (Ctrl+3) does not find an "Open New Terminal" action
• Users (like me) who rely on keyboard-driven workflows cannot quickly spawn a new terminal without first focusing the Terminal view and clicking the toolbar button :(

Expected Behavior

A proper Eclipse <command> (e.g., org.eclipse.tm.terminal.view.ui.command.newTerminal) with a default <handler> should be contributed so that:

1. Users can bind a custom keyboard shortcut to open a new terminal via Preferences > General > Keys
2. The action appears in Quick Access (Ctrl+3) when searching for "terminal"
3. The command works regardless of whether the Terminal view is currently focused or even open

I can fix this myself once I have time.

Environment

• Eclipse IDE 2025-12 (4.38)
• OS: RHEL9
• Terminal Feature 1.0.100.v20260410-1244 org.eclipse.terminal.feature.feature.group