chore: migrate golangci-lint config to v2

- Add version field and migrate to v2 config format
- Replace deprecated linters with modern equivalents
- Add new linters: bidichk, depguard, forbidigo, revive, testifylint, etc.
- Move gofmt, gofumpt, golines to formatters section
- Configure revive rules, depguard deny list, and exclusion presets

.golangci.yml

@@ -1,37 +1,114 @@
+version: "2"
+output:
+  sort-order:
+    - file
 linters:
-  disable-all: true
+  default: none
   enable:
+    - bidichk
     - bodyclose
-    - dogsled
+    - depguard
     - errcheck
-    - exportloopref
-    - exhaustive
-    - gochecknoinits
-    - goconst
+    - forbidigo
+    - gocheckcompilerdirectives
     - gocritic
-    - gofmt
-    - goimports
-    - goprintffuncname
-    - gosec
-    - gosimple
     - govet
     - ineffassign
-    - misspell
+    - mirror
+    - modernize
     - nakedret
-    - noctx
+    - nilnil
     - nolintlint
+    - perfsprint
+    - revive
     - staticcheck
-    - stylecheck
-    - typecheck
+    - testifylint
     - unconvert
     - unparam
     - unused
-    - whitespace
-    - gofumpt
-
+    - usestdlibvars
+    - usetesting
+    - wastedassign
+  settings:
+    depguard:
+      rules:
+        main:
+          deny:
+            - pkg: io/ioutil
+              desc: use os or io instead
+            - pkg: golang.org/x/exp
+              desc: it's experimental and unreliable
+            - pkg: github.com/pkg/errors
+              desc: use builtin errors package instead
+    nolintlint:
+      allow-unused: false
+      require-explanation: true
+      require-specific: true
+    gocritic:
+      enabled-checks:
+        - equalFold
+      disabled-checks: []
+    revive:
+      severity: error
+      rules:
+        - name: blank-imports
+        - name: constant-logical-expr
+        - name: context-as-argument
+        - name: context-keys-type
+        - name: dot-imports
+        - name: empty-lines
+        - name: error-return
+        - name: error-strings
+        - name: exported
+        - name: identical-branches
+        - name: if-return
+        - name: increment-decrement
+        - name: modifies-value-receiver
+        - name: package-comments
+        - name: redefines-builtin-id
+        - name: superfluous-else
+        - name: time-naming
+        - name: unexported-return
+        - name: var-declaration
+        - name: var-naming
+          disabled: true
+    staticcheck:
+      checks:
+        - all
+    testifylint: {}
+    usetesting:
+      os-temp-dir: true
+    perfsprint:
+      concat-loop: false
+    govet:
+      enable:
+        - nilness
+        - unusedwrite
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    rules:
+      - linters:
+          - errcheck
+          - staticcheck
+          - unparam
+        path: _test\.go
 issues:
-  exclude-rules:
-    # Exclude `lll` issues for long lines with `go:generate`.
-    - linters:
-        - lll
-      source: "^//go:generate "
+  max-issues-per-linter: 0
+  max-same-issues: 0
+formatters:
+  enable:
+    - gofmt
+    - gofumpt
+    - golines
+  settings:
+    gofumpt:
+      extra-rules: true
+  exclusions:
+    generated: lax
+run:
+  timeout: 10m