add golangci-lint

[pfi79]

The main idea is to replace outdated checks.

Аfter accepting the pr, I will include other checks

• first those that will remove the old checks: misspell staticcheck gofumpt,
• then I will add new checks, it is now commented out in .golangci.yml

[Copilot]

Pull request overview

This PR integrates golangci-lint into Fabric’s Go linting/tooling flow, aiming to replace older standalone checks and provide a configurable lint pipeline via a new .golangci.yml.

Changes:

• Adds golangci-lint as a managed Go tool and wires it into make linter / scripts/golinter.sh.
• Removes the standalone goimports and go vet steps from the custom linter script and updates the Go style guide accordingly.
• Introduces a new repository-level .golangci.yml with an initial set of enabled linters and settings.

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tools/go.mod	Adds golangci-lint to the tools module and updates indirect requirements accordingly.
tools/go.sum	Records the expanded dependency graph pulled in by golangci-lint and related linters.
scripts/golinter.sh	Removes goimports/go vet checks; adds golangci-lint run invocation.
Makefile	Updates linter target to build/install golangci-lint instead of goimports.
gotools.mk	Registers golangci-lint in the gotools list and tool path mapping.
docs/source/style-guides/go-style.md	Updates documented required tooling to include golangci-lint and remove goimports/go vet.
.golangci.yml	Adds new golangci-lint v2 configuration for enabled linters and settings.

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