feat: example templates for fast development

[weboko]

This is a feature request

Problem

We have a set of examples that are based on the same code and other examples are not coherent.
In the future, I anticipate more examples being created for the reason of showcasing new functionality.
Due to that, it can become messy fast and a developer will have to re-create everything from scratch.

Proposed Solutions

To save time a set of templates should be created. They can be copy-pasted when new example have to be created.
Criteria for a template are:

• Modular - should have UI and logic be split;
• Simple - should cover basic waku functionality inside;
• Extendable - should be easy to add new features, add packages, upgrade old;

Tasks

• Create template for plain JS (light chat should be used here);
• Create template for React / NextJS;
• Create template for Svelte with Vite;
• Create template for Vue or Angular;
• Create template for React Native (old issue React Native Guide/Example js-waku#628, right now blocked by React Native support libp2p/js-libp2p#2136)

[weboko]

upd: added NextJS as needed template based on hacker's feedback

[chair28980]

cc @hackyguru @vpavlin

This might fall under the @waku-org/eco-dev realm.