feat: Remove "Configure a Remote Connection" command

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Description

Related issue: #361 (closed)

Actions:

• Removed "Configure Remote Connection" command in the command palette
• Removed "Configure a remote connection" button from the terminal panel
• Added text in the terminal that tells the user that the terminal is not available in the Web:IDE
• Removed START_REMOTE_COMMAND_ID from import in various files

Screenshots

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