Update README.md - Add info about mac & troubleshooting

[m-Io-oI-m]

Just in case anyone get the same problem .. took me few hours to find the issue.

[AkihiroSuda]

• "On Mac" isn't meaningful here as Mac is the only supported host platform
• The sentence should not assume that everybody is using IDE
• "ie: vscode" sounds like vscode is the only IDE in the world. Did you mean "e.g., "?
• vscode, VSCODE -> VS Code, or Visual Studio Code
• "Symptom: ..." is grammatically hard to read as it starts with an imperative mood. You can ask @copilot to improve the sentence
• What is the "bash script" here?

[Copilot]

Pull request overview

This PR updates the README troubleshooting section to document a macOS-specific networking issue when using socket_vmnet from IDE terminals.

Changes:

• Add a troubleshooting note explaining required “Local Network” permissions for IDEs on macOS.
• Describe the specific symptom pattern when the permission is missing (host cannot ping VM while VM connectivity appears normal).

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[Copilot]

The new troubleshooting bullet has several grammatical and style issues (e.g., subject-verb agreement, "ie" vs. "i.e.", and IDE name capitalization), which makes the guidance harder to read; consider rephrasing to something like: "On macOS, make sure that your IDE (e.g., VS Code) has permission for the Local Network in System Settings → Privacy & Security → Local Network. Symptom: when executing the bash script from the IDE terminal, socket_vmnet starts correctly, the VM can ping its gateway and the internet and the host, but the host cannot ping the VM."

Suggested change

	- On Mac, make sure that the IDE (ie: vscode) have privileges on the "local network" in "System Settings" -> "Privacy & Security" -> "Local Network". Symptom: Execute bash script from VSCODE terminal (or any IDE), `socket_vmnet` start correctly, VM can ping its gateway (host bridge interface), VM can ping internet, VM can ping host but host can NOT ping VM.
	- On macOS, make sure that your IDE (e.g., VS Code) has permission for the Local Network in System Settings → Privacy & Security → Local Network. Symptom: when executing the bash script from the IDE terminal, `socket_vmnet` starts correctly, the VM can ping its gateway and the internet and the host, but the host cannot ping the VM.

[AkihiroSuda]

@copilot, see also my comment in #151 (comment)