Add CI workflow, install.sh, and example config

.github/workflows/build.yml

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+name: Build and Test
+
+on:
+  push:
+    branches: [ "main" ]
+    tags: [ "v*" ]
+  pull_request:
+    branches: [ "main" ]
+
+permissions:
+  contents: write
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.22"
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: Vet
+        run: go vet ./...
+
+      - name: Run tests
+        run: go test ./... -v -cover
+
+  build:
+    name: Build binaries
+    needs: test
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        goos: [linux, windows, darwin]
+        goarch: [amd64, arm64]
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.22"
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: Build
+        env:
+          GOOS: ${{ matrix.goos }}
+          GOARCH: ${{ matrix.goarch }}
+          CGO_ENABLED: 0
+        run: |
+          mkdir -p dist
+          ext=""
+          if [ "${{ matrix.goos }}" = "windows" ]; then ext=".exe"; fi
+          out="dist/kctl-tui-${{ matrix.goos }}-${{ matrix.goarch }}${ext}"
+          go build -o "$out" -ldflags "-s -w" ./cmd/kctl-tui
+          echo "Built $out"
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: kctl-tui-${{ matrix.goos }}-${{ matrix.goarch }}
+          path: dist/*
+
+  release:
+    name: Attach binaries to GitHub Release
+    if: startsWith(github.ref, 'refs/tags/v')
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          path: dist
+          merge-multiple: true
+
+      - name: Create release and upload binaries
+        uses: softprops/action-gh-release@v2
+        with:
+          files: dist/*
+          generate_release_notes: true

config.example.yaml

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+# Example configuration for kctl-tui.
+# Copy this file to ~/.kctl-tui/config.yaml and adjust the values to your
+# own cluster setup. Do NOT commit your real config.yaml with company- or
+# project-specific context/namespace/label names to a public repository.
+
+# Groups of kubectl contexts that belong together (e.g. the same
+# environment pair, such as staging/production of the same cluster).
+# Pressing TAB in the control pane cycles through the contexts listed here
+# while keeping the current namespace.
+context_pairs:
+  - name: "example-environment-pair"
+    contexts:
+      - "example-context-a"
+      - "example-context-b"
+
+# The namespace label key used to group namespaces by team/ownership in the
+# team-selection screen. Adjust this to whatever label your organization
+# actually uses (can contain a domain prefix, e.g. "example.org/team").
+team_label_key: "example.org/team"

install.sh

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+#!/usr/bin/env bash
+# Install script for kctl-tui.
+# Downloads the latest GitHub release binary matching the current OS/arch
+# and installs it to /usr/local/bin (or $INSTALL_DIR if set).
+#
+# Usage:
+#   curl -fsSL https://raw.githubusercontent.com/skoelle/kctl-tui/main/install.sh | bash
+#
+# Requires: curl, a supported OS (linux, darwin).
+# Native Windows is not supported by this script; use WSL, or download the
+# .exe asset manually from the Releases page.
+
+set -euo pipefail
+
+REPO="skoelle/kctl-tui"
+INSTALL_DIR="${INSTALL_DIR:-/usr/local/bin}"
+BIN_NAME="kctl-tui"
+
+os="$(uname -s | tr '[:upper:]' '[:lower:]')"
+arch="$(uname -m)"
+
+case "$arch" in
+  x86_64|amd64) arch="amd64" ;;
+  arm64|aarch64) arch="arm64" ;;
+  *)
+    echo "Unsupported architecture: $arch" >&2
+    exit 1
+    ;;
+esac
+
+case "$os" in
+  linux|darwin) ;;
+  *)
+    echo "Unsupported OS: $os. On Windows, use WSL or download the .exe from the Releases page." >&2
+    exit 1
+    ;;
+esac
+
+echo "Detecting latest release for $REPO ..."
+latest_tag="$(curl -fsSL "https://api.github.com/repos/${REPO}/releases/latest" | grep -m1 '"tag_name"' | sed -E 's/.*"([^"]+)".*/\1/')"
+
+if [ -z "$latest_tag" ]; then
+  echo "Could not determine latest release tag. Is there at least one published release?" >&2
+  exit 1
+fi
+
+asset="kctl-tui-${os}-${arch}"
+url="https://github.com/${REPO}/releases/download/${latest_tag}/${asset}"
+
+echo "Downloading ${asset} (${latest_tag}) ..."
+tmp_file="$(mktemp)"
+curl -fsSL "$url" -o "$tmp_file"
+chmod +x "$tmp_file"
+
+if [ -w "$INSTALL_DIR" ]; then
+  mv "$tmp_file" "${INSTALL_DIR}/${BIN_NAME}"
+else
+  echo "Elevated permissions required to write to ${INSTALL_DIR}"
+  sudo mv "$tmp_file" "${INSTALL_DIR}/${BIN_NAME}"
+fi
+
+echo "Installed ${BIN_NAME} to ${INSTALL_DIR}/${BIN_NAME}"
+"${INSTALL_DIR}/${BIN_NAME}" --help >/dev/null 2>&1 || true
+echo "Done. Run '${BIN_NAME}' to get started."