Remove restriction for params prefixing in packages

[samdark]

Problem

Currenty there is a rule to prefix package parameters with a package name https://github.com/yiisoft/docs/blob/master/000-packages.md#configs-and-defaults. That's mostly great but not always convenient. There could be parameters shared by multiple services. For example, it is convinient when:

• language parameter is shared for translator and view.
• db parameter is shared for yiisoft/db and yiisoft/yii-cycle connection.

Proposal

1. Remove such limitation from docs, leave it as suggestion.
2. Choose common parameter names.

[vjik]

Hm... seems this is not problem.

We can use current naming conventions in packages, but in application template and demo application use params on app level. For example, in app create $params['language'] and use this param for translator and view.

[samdark]

Agree.