Provide command in the palette to open textual editor in another editor group when Kaoto editor is active

[apupier]

Technical:

• Condition when the Kaoto editor is active:
  • maybe activeCustomEditorId https://code.visualstudio.com/api/references/when-clause-contexts#available-context-keys
  • maybe id to use is webviewEditorsKaoto https://github.com/KaotoIO/vscode-kaoto/blob/db3e5de69c167937facdce5b30f701732a997728/package.json#L108C22-L108C41
• Name proposal for the command:
  • Open Camel file with textual editor on the side
• command must be in the category Camel (like commands of our other extensions: https://github.com/camel-tooling/camel-lsp-client-vscode/blob/048a4c708641a1b86ac4feeaf7438fbc61b7c3d0/package.json#L188 )
• Worth an entry in changelog and doc/readme