Replace all logging with Serilog

[David Bennett (dkbennett)]

Summary of the pull request

Removes DevHome.Logging and replaces it with Serilog with appropriate sinks for Console and File logging.

Format of the logs has changed, as well as where they are located.

Single log in the TempState folder for the application instead of multiple logs.

References and relevant issues

Detailed description of the pull request / Additional comments

• DevHome.Logging removed.
• Serilog and related nuget packages added.
• appsettings.json added to the project with log settings.
• All static logging converted over to Serilog
• Some log levels were changed for spammier components.
• New logging added in places using lazy initialization.
• TestContext sink added in place of TestListener, which writes Serilog events to the TestContext.
• Updated all test setups to automatically log and output log messages to TestContext. This means any logs generated during test runs by components will be captured in both a temporary log and in the test output for easy analysis.
• Updated testconsole with logging setup so ad hoc testing with it is already configured for logging.

Log formatting changes:

• Log format was changed to be more compact, easier to parse and be human-readable.
• Log format is similar to Serilog's default modified to be close to the previous log format.
• Single log instead of multiple logs.
• Log has a daily interval where it will be a new file, rolling over 30 days.

Validation steps performed

• Ran all tests and ensured they are producing logs and TestContext messages as well as passing.
• Scenario tested widgets and verified logging.
• Cloned a repository by url

PR checklist

• Closes #xxx
• Tests added/passed
• Documentation updated

[Darren Hoehna (dhoehna)]

Looks good from Repo perspective.