Make logError easier human readable in console

[passsy]

The current output of logError in console is hard to scan.

flutter: [ERROR] { exception: An error occured, stacktrace: #0      Auth0Authentication.refreshLogin.<anonymous closure> (package:my_app/authenticate/auth0_authentication.dart:168:11)
<asynchronous suspension>
#1      Auth0Authentication.refreshLogin.<anonymous closure> (package:my_app/authenticate/auth0_authentication.dart)
#2      Auth0Authentication.refreshLogin (package:my_app/authenticate/auth0_authentication.dart:172:6)
#3      SessionManager.autoLogin (package:my_app/src/session/session_manager.dart:39:36)
<asynchronous suspension>

1. The log message doesn't start with the error message but with { exception:
2. The first list of the stacktrace is in the same line as the message pushing the important part out of view (without softwrap)
3. Not having #0 at the beginning of the line breaks the parsing of stacktraces for tools. IntelliJ isn't able to collapse long stacktraces.

The proposed changed adds a newline before the stacktrace starts and removes the curly braces. The output of this change looks like this:

flutter: [ERROR] Auth0 lib failed while parsing the auth0 error response
#0      Auth0Authentication.refreshLogin.<anonymous closure> (package:my_app/authenticate/auth0_authentication.dart:168:11)
<asynchronous suspension>
#1      Auth0Authentication.refreshLogin.<anonymous closure> (package:my_app/authenticate/auth0_authentication.dart)
#2      Auth0Authentication.refreshLogin (package:my_app/authenticate/auth0_authentication.dart:172:6)
#3      SessionManager.autoLogin (package:my_app/src/session/session_manager.dart:39:36)
<asynchronous suspension>
#4      runhApp.<anonymous closure>.<anonymous closure> (package:my_app/app/app.dart:105:30)
<asynchronous suspension> [4 more...]

• [x] The error message is easy to read
• [x] Stacktrace line #0 starts at new line
• [x] IntelliJ collapsing works

[passsy]

@jorgecoca @felangel push. Is anyone of you still maintaining this project?

[jorgecoca]

@tchabot22 @dakrawczyk can you folks take a look (and resolve the pipeline issue)? Thanks!

[tlvenn]

@dakrawczyk any chance you can push this PR forward ?

[tlvenn]

@passsy could you rebase on the base branch so it's ready to be merged ?