fix: (Core) unify the naming of the cozy property

[InnaAtanasova]

Please provide a link to the associated issue.

close #3518

Please provide a brief summary of this pull request.

for the cozy property both cosy and cozy were used. It was decided that only cozy should be used. This PR is removing all the appearances of cosy in the Bar component and in the documentation examples.

BREAKING CHANGE:
In Bar component the Input property cosy was renamed to cozy for consistency with other components and Fiori 3 naming. Affected components: DateTime Picker, Dialog (footer and header).

Before:

<div fd-bar barDesign="footer" [cosy]="!compact">

Now:

<div fd-bar barDesign="footer" [cozy]="!compact">

Please check whether the PR fulfills the following requirements

• the commit message follows the guideline:
  https://github.com/SAP/fundamental-ngx/blob/master/CONTRIBUTING.md

Documentation checklist:

• Breaking Changes Wiki
• Documentation Examples

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