Remove dev-tools from tooltips demo

[maribethb]

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Component

custom-tooltips-demo

Problem

This example has a dependency on the dev-tools plugin, which adds the advanced playground to the demo page. The advanced playground is not necessary for the demo. Having a dependency on a plugin in examples/ makes it hard to keep the example up to date, because it can't be updated until after the plugin is actually published.

Request

The custom-tooltips-demo should be updated to manually inject a regular Blockly workspace instead of using the advanced playground.

When this is done, the description field in package.json should also be updated, as instructing the user to select the default toolbox only applies to the advanced playgroudn.

Alternatives considered

No response

Additional context

No response