187 - Files table download button

[MellyGray]

What this PR does / why we need it:

This PR add the Download Button to the Files Table. (Only the UI with no backend integration yet)

Which issue(s) this PR closes:

• Closes [Frontend] Files Table Download Button #187

Special notes for your reviewer:

Suggestions on how to test this:

1. Install the necessary dependencies using npm install.
2. Build the design system with cd packages/design-system && npm run build.
3. Navigate back to the root directory with cd ../../.
4. Start Storybook with npm run storybook.
5. Visit the Dataset in the Storybook to check that the Download button is being displayed in the Files Table, also check the behaviour about showing the No Selected Files Modal if no files are being selected

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

Mockup of the requested element

For tabular data this is a dropdown

Is there a release notes update needed for this change?:

Download button added to the Files Table UI

Additional documentation:

[coveralls]

coverage: 98.286% (-0.08%) from 98.367% when pulling 9675c50 on feature/187-files-table-download-button into ac5c109 on develop.

[ekraffmiller]

Hi Melina, this looks good, my only comment is do we need to add this button to the DatasetFiles-Default story?
JSF UI

DatasetFiles story

[MellyGray]

@ekraffmiller Now the default story should display de download button, thx!

[ekraffmiller]

LGTM!

[GPortas]

Works good on Storybook!

Merging