feat: add defaultAsBreadcrumb option

[bawahakim]

Motivation

Currently, all logs are sent by default to Sentry, unless we explictly pass true to asBreadcrumb to the logger method. This is impractical, and also causes issues for framework level log (such as nestjs route explorer).

Solution

Introduce a non-breaking defaultAsBreadcrumb option. It takes in a non-error level log array to define which method should default to breadcrumb (in opposition to capturing an event)

Example Usage

SentryModule.forRoot({
      dsn:  // DSN
      enabled: true,
      defaultAsBreadcrumb: ['warn', 'log', 'debug', 'verbose'],
    }),

Caveats

The SentryServiceInstance method returns a new SentryService in which the options are undefined. To fix, it was necessary to set the instance in the constructor (when the options have been specified). This seems to work well but unsure of any side-effects within the package

[ntegral]

@bawahakim - Thanks for creating the PR. I'll review this and look to get it added before the end of the week.