Force-push new history with a single commit for the default deployment strategy

[spenserblack]

The purpose of this repo was to make the main repository the source of version control for the wiki, instead of a separate repository (with very different security and UI). Given that the history is preserved in the main repository, it might be worth considering a simpler, more destructive strategy for deploying the wiki.

This could resolve #72

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This is somewhat inspired by instructions for manually deploying to gh-pages in the Vue CLI docs, which is

set -e

npm run build
# or
yarn build

cd dist

git init
git add -A
git commit -m 'deploy'

# deploy to gh-pages
git push -f [email protected]:OWNER/REPO.git master:gh-pages

cd -

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It might also be worth taking inspiration from peaceiris/actions-gh-pages.

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If a strategy option is added, this would be called the orphan strategy.

[jcbhmr]

See also https://github.com/Andrew-Chen-Wang/github-wiki-action#strategy-option
and https://github.com/Andrew-Chen-Wang/github-wiki-action/blob/master/src/init.sh