Add `install` npm script

[m-bock]

When trying out the new side bar feature, I realized that the build script is not triggered on running npm install.

I guess if there was an install script it would build to dist and then register the CLI binary in node_modules/.bin so that the following would work:

npm install purescript-docs-search
npm run purescript-docs-search

[klntsky]

Thank you for this report.

We are only using NPM to distribute the precompiled binary. Compiling PureScript in a preinstall script would be too inconvenient for most users.

npm install purescript-docs-search does register the binary in node_modules/.bin.

However, npm run purescript-docs-search is a shortand for npm run-script purescript-docs-search, which is supposed to run scripts["purescript-docs-search"] from the currently present package.json - I am pretty sure this is not what you are trying to accomplish.

Perhaps you might want to use npx: npm i -g npx && npx purescript-docs-search.

[klntsky]

I added "development" section to the README in #36.

[f-f]

I believe we can close this, right?