Create ADR for WASM-compiled cardano-api (#75)

* Create ADR for WASM-compiled `cardano-api`
* Fix typos caught by @carbolymer
* Add links to main external references
* Restructure to follow ADR-000's guidelines
* Improve and expand description of advantages of static dApps
* Add appendix about CORS and SOP
* Fix typos in the Appendix section
* Explain the conversion from Haskell type to JavaScript object more in detail
* Expand explanation on handling stateful functions
* Update to reflect latest changes in code

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Co-authored-by: Mateusz Galazyn <[email protected]>

Author: palas