ref: create debuglog package

[giortzisg]

Description

Create a debuglog package to easily access the sentry.DebugLogger without depending on the root level. This change aims to remove any cyclic imports when internal packages are used on the top level, but also want to access the debug logger.

Issues

• resolves: Create a package for debug logger and move it internally #1104
• resolves: GO-88

[linear]

GO-88 Create a package for debug logger and move it internally

[codecov]

Codecov Report

❌ Patch coverage is 64.70588% with 24 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.92%. Comparing base (4edee8a) to head (8df1e66).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
transport.go	57.89%	8 Missing ⚠️
tracing.go	58.33%	5 Missing ⚠️
util.go	33.33%	4 Missing ⚠️
client.go	75.00%	2 Missing ⚠️
fasthttp/sentryfasthttp.go	0.00%	1 Missing ⚠️
fiber/sentryfiber.go	0.00%	1 Missing ⚠️
integrations.go	66.66%	1 Missing ⚠️
logrus/logrusentry.go	0.00%	1 Missing ⚠️
slog/converter.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1105      +/-   ##
==========================================
- Coverage   86.98%   86.92%   -0.06%     
==========================================
  Files          54       56       +2     
  Lines        6068     6080      +12     
==========================================
+ Hits         5278     5285       +7     
- Misses        645      649       +4     
- Partials      145      146       +1     

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[lcian]

LGTM in principle and I understand the problem this solves.
I think it's a bit unfortunate that we have to lock on every message, and I wonder if there's a different way to do it without locking.
Anyways, I would assume that customers don't enable Debug: true in production, so it shouldn't be a big deal in practice.

[giortzisg]

@lcian We can actually remove the mutex locks by removing the SetLogger function. I guess SetOutput would suffice.

[lcian]

Nice!