Initial commit: Go CLI implementation

This is the initial state of the StoreConnect Go CLI before Milestone 1
implementation. Includes:
- Complete CLI structure with Cobra
- Theme, content, and API management commands
- Configuration and credential management
- Serialization/deserialization
- Test suite with 100% coverage

Base features working:
- sc init, connect, disconnect
- sc theme list, pull, push, preview, publish
- sc article, block, category, menu, media, page, product commands
- sc status

Ready for Milestone 1: JSON output and exit codes.

Author: Mikel Lindsaar

.github/workflows/ci.yml

@@ -0,0 +1,101 @@
+name: CI
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main, develop ]
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go-version: [ '1.21', '1.22', '1.23' ]
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: ${{ matrix.go-version }}
+
+    - name: Download dependencies
+      run: go mod download
+
+    - name: Verify dependencies
+      run: go mod verify
+
+    - name: Run tests
+      run: go test -v -race -coverprofile=coverage.out ./...
+
+    - name: Upload coverage
+      uses: codecov/codecov-action@v4
+      with:
+        file: ./coverage.out
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: '1.23'
+
+    - name: Run golangci-lint
+      uses: golangci/golangci-lint-action@v6
+      with:
+        version: latest
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: '1.23'
+
+    - name: Build binary
+      run: make build
+
+    - name: Upload binary
+      uses: actions/upload-artifact@v4
+      with:
+        name: sc-linux-amd64
+        path: bin/sc
+
+  build-multi:
+    name: Multi-platform Build
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push'
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: '1.23'
+
+    - name: Build for all platforms
+      run: make build-all
+
+    - name: Upload artifacts
+      uses: actions/upload-artifact@v4
+      with:
+        name: binaries
+        path: bin/*

.gitignore

@@ -0,0 +1,43 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+bin/
+dist/
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool
+*.out
+coverage.html
+
+# Dependency directories
+vendor/
+
+# Go workspace file
+go.work
+
+# IDE-specific files
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS-specific files
+.DS_Store
+Thumbs.db
+
+# StoreConnect specific
+.storeconnect/
+themes/
+!.storeconnect/.gitkeep
+!themes/.gitkeep
+
+# Credentials (never commit)
+credentials.yml
+*.key
+*.pem

.golangci.yml

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+# golangci-lint configuration
+run:
+  timeout: 5m
+  tests: true
+  skip-dirs:
+    - vendor
+  skip-files:
+    - ".*\\.pb\\.go$"
+
+linters-settings:
+  errcheck:
+    check-type-assertions: true
+    check-blank: true
+
+  govet:
+    enable-all: true
+    disable:
+      - fieldalignment
+
+  gofmt:
+    simplify: true
+
+  goimports:
+    local-prefixes: github.com/GetStoreConnect/storeconnect-cli
+
+  goconst:
+    min-len: 3
+    min-occurrences: 3
+
+  misspell:
+    locale: US
+
+  lll:
+    line-length: 120
+
+  gocyclo:
+    min-complexity: 15
+
+  dupl:
+    threshold: 100
+
+  gocritic:
+    enabled-tags:
+      - diagnostic
+      - experimental
+      - opinionated
+      - performance
+      - style
+
+linters:
+  enable:
+    - errcheck
+    - gosimple
+    - govet
+    - ineffassign
+    - staticcheck
+    - unused
+    - gofmt
+    - goimports
+    - goconst
+    - misspell
+    - lll
+    - gocyclo
+    - dupl
+    - gocritic
+
+  disable:
+    - typecheck
+
+issues:
+  exclude-use-default: false
+  max-issues-per-linter: 0
+  max-same-issues: 0
+
+  exclude-rules:
+    # Exclude some linters from running on tests files.
+    - path: _test\.go
+      linters:
+        - gocyclo
+        - errcheck
+        - dupl
+        - gosec
+        - lll