[Bug] All cookies disappear after refreshing

[roseline124]

Issue

If I don't set the cookie in the parameters, it will disappear.

If I add this addon to a new project that doesn't have any storybooks, I'll just need to set the cookie for each storybook.

However, if I already have a lot of existing storybooks, it's a pain to set the cookie in parameters for each storybook individually (even if I bind a template, I still have to swap existing storybooks with the template, which is also a pain).

Proposal

Add preserveCookie(Boolean) as an option to the addon, so that if preserveCookie is true, no cookies are lost without setting parameters['cookie'] in each storybook.

If parameters['cookie'] exists in a particular storybook, it will cause existing cookies to be overwritten with the values in the cookie.

• Example: addons: [{ name: 'storybook-addon-cookie', options: { preserveCookie: true } }, ...] (.storybook/main.ts)
• The default value of preserveCookie is true.

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