feat: add `User work` to VSCode remote connection info

[agatha197]

resolves https://github.com/lablup/giftbox/issues/666

What changed?

• Add User work
• Added styles for ssh-connection-example and vscode-connection-example classes.
• Updated handling of window.__local_proxy.url check.
• Refactored HTML structure and added conditional rendering.
• Modified checkbox and textfield behavior.
• Added checkbox for allowPreferredPort.
• style: For dark theme support, refactoring styling codes.

How to test

1. create a session in electron mode
2. click session app -> click vscode desktop

Screenshots

Checklist: (if applicable)

• [x] Mention to the original issue
• [x] Documentation : https://github.com/lablup/backend.ai-docs-webui/pull/57
• [ ] Minium required manager version
• [x] Specific setting for review (eg., KB link, endpoint or how to setup)
• [x] Minimum requirements to check during review
• [ ] Test case(s) to demonstrate the difference of before/after

[agatha197]

• #2375 👈
• main

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Coverage report for ./react

St.:grey_question:	Category	Percentage	Covered / Total
🔴	Statements	2.99%	118/3944
🔴	Branches	3.25% (+0% 🔼)	87/2674
🔴	Functions	1.45% (-0% 🔻)	19/1309
🔴	Lines	2.95%	114/3867

Test suite run success

32 tests passing in 4 suites.

Report generated by 🧪jest coverage report action from e5362a003b1640cff4bba2956275955f72e173c2