Implement 'Save All' Button Functionality

[devangm]

Blocked by #378
Blocked by #383
Blocks #381

As a developer,
I want to have a 'Save All' button on the 'Temporal Graph', so that I can download a CSV file containing the publication counts of all suborganizations.

Acceptance Criteria:

• Add a 'Save All' button to the graph interface.
• Provide a check box in the header of the table to select/unselect all records in the table.
• When the 'Save All' button is clicked, generate and download a CSV file of selected records that includes:
  - The names of all suborganizations.
  - The total publication count for each suborganization.
• Ensure that the CSV file reflects the most up-to-date data being displayed on the graph, regardless of any filtering or selections made by the user.
• Sample CSV file : school-of-education_publications-per-year.csv

Other Information:

• This component should be a part of the 'left column', created in Implement basic layout for 'Temporal Graph' #383