feat(board): add confirm dialog when deleting a board

[ColinFrick]

Description Adds a confirm dialog when deleting a board.

Fixes #8

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [X] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [X] This change requires a documentation update

Checklist

• [X] I have read the Contribution Guidelines
• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [X] I have commented my code, particularly in hard-to-understand areas
• [X] My changes generate no new warnings
• [X] Any dependent changes have been merged and published in downstream module

Expected Outcome Provide information about the expected outcome of your changes, share screenshots if possible