Deleting tools and adjusting dependencies to use new @thingweb packages

[egekorkan]

With new locations for our dependencies at the following locations, we can adjust the repo and dependencies to use the new locations:

• https://www.npmjs.com/package/@thingweb/thing-model
• https://www.npmjs.com/package/@thingweb/open-api-converter
• https://www.npmjs.com/package/@thingweb/json-spell-checker

[hasanheroglu]

I will handle this.