[Enh]: Let's consider some default `log-level` values in `dab init`.

[JerryNixon]

What?

Observe and remove needless namespaces in the dab start output.

Why?

We can be smart about this and reduce the noise in dab start.

How?

Limit, do not eliminate. Allow developer to change after dab init.

{
  "log-level": {
    "Select-Namespace": "warning"
  }
}

Ideal output

C:\Temp\dab-todo-test>dab start -c "dab-config.json" 
info: Microsoft.DataApiBuilder 2.0.0
info: User provided config file: dab-config.json
info: Now listening on: http://localhost:5000
info: Now listening on: https://localhost:5001

Data API builder Preamble

info: Microsoft.DataApiBuilder 2.0.0
info: User provided config file: dab-config.json

Data API builder Postlude

info: Now listening on: http://localhost:5000
info: Now listening on: https://localhost:5001

Candidates

• Azure.DataApiBuilder.Core: Warning
• Azure.DataApiBuilder.Service: Warning
• Microsoft.AspNetCore.DataProtection: Warning
• Microsoft.AspNetCore.Mvc: Warning
• Microsoft.Hosting: Warning
• Microsoft.Extensions.Hosting: Warning