ref: Refactor for simplifying the plugin samples.

[GuiLeme]

What does this PR do?

It basically simplifies all the samples, now we have each of them with specific role of testing a single feature of the plugin API (Overall this wasn't a big of a change... Because most of the samples already followed that pattern). The directives now are:

• One sample for each extensible area, because they are visual;
• One sample for each of the other pluginAPIs (and only one) - that is data-consumption-hook, ui-commands, server-commands, ui-events, dom-element-manipulation and so on;

Besides that, I also updated the packages and npm audit fix the ones that needed.

Motivation

With this new way of doing the samples, a novice plugin dev won't find it hard to test and see each functionality working separately. This way, we decrease the learning curve for the plugins.

[antobinary]

Should we still be targeting main or should we point to v0.0.x?