Added log level support to SimpleLogger

[marwansalem]

Implement Log levels.
Can be used as the default logger.
Default log level can be later specified via configuration, or environment variable.
I had been using the library and found out that I needed to define a custom logger to suppress logs, to be specific
I was using the dbfsAPI to upload files, and I was getting bombarded with logs with each add_block request.

Changes

Add new Implementation for the Logger interface which respects the log level.

Tests

added 2 new tests found in level
-logger_test.go

• make test passing
• make fmt applied
• relevant integration tests applied

[nfx]

just add this to SimpleLogger - we expect downstream dependencies to implement their own logger, but it's fine to add level understanding to SimpleLogger

[marwansalem]

Please review, but now the default level should be Info, since it maps to int 0

[nfx]

please add Enabled(..) calls to every method in the simple logger. otherwise, this has no effect :)

e.g. if we call logger.Debugf(..) and we have logging.LevelInfo set, it shouldn't print anything

[marwansalem]

Please check 👍

[nfx]

Suggested change

	if !l.Enabled(ctx, l.Level) {
	if !l.Enabled(ctx, l.LevelTrace) {

if not changed, it'll always return true ;)

change it in other places as well

[marwansalem]

The last two comments including this one are valid, but do you think we can add tests to validate them?

[codecov-commenter]

Codecov Report

Patch coverage: 9.09% and project coverage change: -0.28 ⚠️

Comparison is base (fdf0bf4) 19.13% compared to head (23bd41d) 18.85%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #426      +/-   ##
==========================================
- Coverage   19.13%   18.85%   -0.28%     
==========================================
  Files          82       82              
  Lines        8872     8998     +126     
==========================================
- Hits         1698     1697       -1     
- Misses       7028     7152     +124     
- Partials      146      149       +3     

Impacted Files	Coverage Δ
logger/simple.go	6.25% <9.09%> (+6.25%)	⬆️

... and 7 files with indirect coverage changes

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