Add spell check script (#26228)

* Add spell check script

Signed-off-by: Ricardo Pchevuzinske Katz <ricardo.katz@gmail.com>

* Add instructions on how to run the spelling verification script

Signed-off-by: Ricardo Pchevuzinske Katz <ricardo.katz@gmail.com>

scripts/verify-spelling.sh

@@ -0,0 +1,69 @@
+#!/usr/bin/env bash
+
+# Copyright 2019 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+##########
+# This script verifies mispellings in location. Today it only supports
+# verifying English locale but can be modified in a future to support 
+# also other locales.
+# You need to run this script inside the root directory of "website" git repo.
+# 
+# Syntax: verify-spelling.sh LOCALE
+# Example: verify-spelling.sh en
+# If no locale is passed, it will assume "en"
+# 
+# Requirements:
+# - go v1.14 or superior version
+
+
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+TOOL_VERSION="v0.3.4"
+
+LANGUAGE="${1:-en}"
+# cd to the root path
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd -P)"
+cd "${ROOT}"
+
+# create a temporary directory
+TMP_DIR=$(mktemp -d)
+
+# cleanup
+exitHandler() (
+  echo "Cleaning up..."
+  rm -rf "${TMP_DIR}"
+)
+trap exitHandler EXIT
+
+# perform go get in a temp dir as we are not tracking this version in a go module
+# if we do the go get in the repo, it will create / update a go.mod and go.sum
+cd "${TMP_DIR}"
+GO111MODULE=on GOBIN="${TMP_DIR}" go get "github.com/client9/misspell/cmd/misspell@${TOOL_VERSION}"
+export PATH="${TMP_DIR}:${PATH}"
+cd "${ROOT}"
+
+# check spelling
+RES=0
+echo "Checking spelling..."
+ERROR_LOG="${TMP_DIR}/errors.log"
+git ls-files | grep content/${LANGUAGE} | xargs misspell > "${ERROR_LOG}"
+if [[ -s "${ERROR_LOG}" ]]; then
+  sed 's/^/error: /' "${ERROR_LOG}" # add 'error' to each line to highlight in e2e status
+  echo "Found spelling errors!"
+  RES=1
+fi
+exit "${RES}"