Default technique state

As a user of the ATT&CK navigator, I want to be able to configure the default technique state, both in the Navigator itself and in uploaded layers.

The default state would be overridden by defined values in the techniques of an uploaded layer. For example, the user could set the default state of enabled to false, thereby disabling all techniques, then upload a layer with a few explicitly enabled techniques to only enable those techniques.

This could be configured as part of the Navigator configuration, and also in the layer file itself.

• If defined in the config file, it would set the default state of techniques for all layers (created or uploaded) to the configured defaults.
• In the layer file, it would set the default state of techniques on just that that layer to the configured default. This would also override the defaults defined in the config file.

Start by tracing the Navigator configuration and uploaded-layer loading entry points. Define how configured defaults apply to techniques, then verify that explicit technique states override layer defaults and that layer defaults override Navigator defaults. Done means both configuration locations support the described precedence consistently.