API cache

[sounisi5011]

In the current code, the response of the Netlify API is not cached in order to get the latest data.
However, fetching data about every deploy has the following problems:

• Too late. Generally, network requests take time.
• Netlify API is rate limited. Requests to the API are limited to a maximum of 200 per minute.
• Network requests can fail. If there is a cache for the preview page, it should be possible to build even without a network connection.

To solve the above problem, we propose to cache the API response.
Data from older deploys will probably not change. Therefore, it should be possible to cache.

[sounisi5011]

I propose JSON Lines as a cache file format.
JSON Lines has the following features:

• Do not need to pre-parse all data. It is sufficient to read only the required data line by line.
• The data format is compatible with JSON.