feat: standardize logging

[zivkovicmilos]

Description

This PR introduces log standardization across the codebase, to utilize the slog.Logger.

Since the gno repo currently utilizes go1.20 as the minimum version, this PR utilizes the golang.org/x/exp/log package.

Additionally, this PR removes log level management from the TM2 config, and instead moves it into the start command.

Closes #999

Thank you @gfanton for helping out with zap and simplifying the API 🙏
Special shoutout to @moul's zapconfig, for being an inspiration on zap setup.

BREAKING CHANGE:

• the tm2/log logger interface has been removed, everything has been swapped to *slog.Logger

Example of different log levels:

Contributors' checklist...

• Added new tests, or not needed, or not feasible
• Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory
• Updated the official documentation or not needed
• No breaking changes were made, or a BREAKING CHANGE: xxx message was included in the description
• Added references to related issues and PRs
• Provided any useful hints for running manual tests
• Added new benchmarks to generated graphs, if any. More info here.

[zivkovicmilos]

@gfanton @ajnavarro

Things we need to agree on:

• logging creation API (should it be able to error out?)
• default log levels
• how do we manage test loggers? what's the output / level?
• ... ?

[codecov]

Codecov Report

Attention: 103 lines in your changes are missing coverage. Please review.

Comparison is base (87179b9) 55.80% compared to head (18727d8) 56.05%.
Report is 1 commits behind head on master.

Files	Patch %	Lines
tm2/pkg/log/testing.go	0.00%	49 Missing ⚠️
gno.land/pkg/integration/testing_integration.go	38.09%	12 Missing and 1 partial ⚠️
tm2/pkg/log/noop.go	0.00%	12 Missing ⚠️
gno.land/pkg/gnoland/app.go	0.00%	5 Missing ⚠️
gno.land/cmd/gnoland/start.go	85.18%	3 Missing and 1 partial ⚠️
gno.land/cmd/gnoweb/main.go	0.00%	3 Missing ⚠️
tm2/pkg/sdk/context.go	33.33%	2 Missing ⚠️
gno.land/pkg/gnoland/node_inmemory.go	0.00%	1 Missing ⚠️
gno.land/pkg/gnoweb/gnoweb.go	93.33%	1 Missing ⚠️
...pkg/bft/abci/example/kvstore/persistent_kvstore.go	50.00%	1 Missing ⚠️
... and 12 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1302      +/-   ##
==========================================
+ Coverage   55.80%   56.05%   +0.24%     
==========================================
  Files         435      436       +1     
  Lines       66056    66498     +442     
==========================================
+ Hits        36863    37274     +411     
- Misses      26320    26325       +5     
- Partials     2873     2899      +26     

Flag	Coverage Δ
go-1.21.x	∅ <ø> (∅)
misc	∅ <ø> (∅)
misc-_test.genstd	∅ <ø> (∅)

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[zivkovicmilos]

Pinging @moul to take a look at the discussions 🙏

[zivkovicmilos]

I've added a small go mod tidy script:

6471c93

[zivkovicmilos]

@moul

@gfanton has enabled the support for debug logs in the CI, so now we can grab CI log artifacts on a per-test basis 😎

[moul]

can we merge in make fmt instead?

[zivkovicmilos]

Merged:

7eb92d2

Updated CI:
7720593

We should think about goimports linting for *.gno imports in the future

[moul]

Can you please double-check? I vaguely recall creating something similar, possibly only in the CI. Just ensure that there isn't already an existing solution for the same purpose.

[zivkovicmilos]

It turns out we had not 1, but 2 tidy flows 🙂

Fixed:
9ab96d0 and a8fe8d3