chore: add LICENSE

The link to LICENSE was broken, so I removed it and created the license to this repo. It inherits the license as of [create-solid v0.2.12](https://www.npmjs.com/package/create-solid/v/0.2.11). That version references the date in the commit history: https://github.com/honojs/create-hono/commit/5c5fa4398ce509f14a2a254901cf5e32d172e97d