Attachment path generation function may replace ~ characters in original filenames

[ReagentX]

From @rllbe in #151:

imessage-exporter/imessage-database/src/tables/attachment.rs

Lines 251 to 257 in c73bc4d

	/// Generate a MacOS path for an attachment
	fn gen_macos_attachment(path: &str) -> String {
	if path.starts_with('~') {
	return path.replace('~', &home());
	}
	path.to_string()
	}

Line 254 may replace not only the '~' characters at the beginning of path strings, but also those in the original filenames at the end of it, resulting in errors when copying attachments

Suggestion: It might be better to ensure that only the first '~' character is replaced:

            return format!("{}{}", &home(), &path[1..]);