Add .konductor/envrc.sh environment setup script

.konductor/envrc.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+# Environment setup for grafana-kubernetes-datasource
+# Usage: source .konductor/envrc.sh
+
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+
+# ---------- Go (via gvm) ----------
+GO_VERSION="go1.25.7"
+
+export GVM_DIR="${HOME}/.gvm"
+if [[ -s "${GVM_DIR}/scripts/gvm" ]]; then
+  # shellcheck source=/dev/null
+  . "${GVM_DIR}/scripts/gvm"
+else
+  echo "gvm not found at ${GVM_DIR}/scripts/gvm — install from https://github.com/moovweb/gvm" >&2
+  return 1
+fi
+
+if ! gvm list | grep -q "${GO_VERSION}"; then
+  echo "Installing ${GO_VERSION} via gvm..."
+  gvm install "${GO_VERSION}" -B
+fi
+
+gvm use "${GO_VERSION}"
+
+echo "Go $(go version | awk '{print $3}')"
+
+# ---------- Mage ----------
+if ! command -v mage &>/dev/null; then
+  echo "Installing mage..."
+  go install github.com/magefile/mage@latest
+fi
+
+echo "mage: $(command -v mage)"
+
+# ---------- Node (via nvm) ----------
+export NVM_DIR="${NVM_DIR:-${HOME}/.nvm}"
+if [[ -s "${NVM_DIR}/nvm.sh" ]]; then
+  # shellcheck source=/dev/null
+  . "${NVM_DIR}/nvm.sh"
+else
+  echo "nvm not found at ${NVM_DIR}/nvm.sh — install from https://github.com/nvm-sh/nvm" >&2
+  return 1
+fi
+
+NODE_VERSION="$(cat "${REPO_ROOT}/.nvmrc")"
+nvm install "${NODE_VERSION}" --silent
+nvm use "${NODE_VERSION}" --silent
+
+echo "Node $(node --version) — npm $(npm --version)"
+
+# ---------- npm dependencies ----------
+if [[ ! -d "${REPO_ROOT}/node_modules" ]]; then
+  echo "Running npm install..."
+  (cd "${REPO_ROOT}" && npm install)
+fi
+
+echo "Environment ready."