Clarify confusing properties

Background

The documentation refers to various properties in either ambiguous or misleading ways. Therefore we should clarify the documentation or rename them:

1. FilterMatchInfo
   • The property names are too generic and can cause naming conflicts (e.g. with "info" module). For example, details is an appropriate name for the request details in the context of a webRequest.onBeforeRequest listener, but not in the context of ewe.reporting.onFilterMatch, where it's unclear what the difference is between details and info just by looking at their names. See also confusion around types in #99 (closed).
2. FirstRunInfo
   • subscriptionsFirstRun: It's not clear whether the description refers to only downloadable subscriptions or also special subscriptions (thereby implying whether custom filter exist).
   • It's difficult to use those properties in conditions due to their vague names. They also lead to double negation when we use them to check for preexisting data, because they indicate whether it doesn't exist.
3. Subscription
   • downloadable: Not sorted alphabetically, which makes it easier to miss while skimming through the documentation.

I also noticed that the README still links to eyeo/adblockplus/webext-sdk. It's not causing any problems, but it could be fixed as part of this issue, if we're already working on cleaning up the documentation.

Use case

Being able to understand the purpose and meaning of properties that are exposed by the SDK via its API.

What to change

Clarify the documentation for the above mentioned properties.

Suggested change

Update the documentation as follows

1. FilterMatchInfo
   • Rename details property to request.
   • Rename info property to matchInfo.
     • Rename info.matchingMethod property to matchInfo.method
2. FirstRunInfo
   • Clarify that subscriptionsFirstRun property also considers whether custom filters exist.
   • Rename and negate subscriptionsFirstRun to foundSubscriptions.
   • Rename and negate storageFirstRun to foundStorage.
3. Subscription
   • Fix alphabetical order of properties.