fix all typos

scripts/cspell.sh

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+# check spelling
+# see https://cspell.org/docs/installation/
+# and https://github.com/streetsidesoftware/vscode-spell-checker/blob/main/FAQ.md
+
+# go to root top level directory
+# install cpsell with yarn add --dev cspell@latest
+
+# first time installation
+#  1) run `npx cspell "**" --no-progress --unique > words-found-verbose.txt`
+#  and check if there are folders that you should be added to the ignore list in cpsell.json
+#
+#  2) then to build up the dictionary with just the words
+#  % npx cspell --words-only --unique "**" | sort --ignore-case > project-words.txt
+
+# To run a full check on the code do:
+#  % npx cspell "**"