Accessibility/Memory Leak Fixes + Expanded Ember/Modifier support

🚀 Enhancement

• #1099 Allow ember-modifier v3 & bump intersection-observer-admin (@elwayman02)
• #1091 [A11y] Set focus on scroll-into-view (@rajbirsingh83)
• #854 Ember 5 Support (@elwayman02)

🐛 Bug Fix

• #962 Partially fix embroider builds (@elwayman02)

🏠 Internal

• #1100 Remove sinon sandbox (@elwayman02)
• #1099 Allow ember-modifier v3 & bump intersection-observer-admin (@elwayman02)
• #1098 Ember 5.11 Blueprint Updates (@elwayman02)
• #965 Node 18 (@elwayman02)
• #854 Ember 5 Support (@elwayman02)
• #962 Partially fix embroider builds (@elwayman02)

Committers: 2

• Jordan Hawker (@elwayman02)
• @rajbirsingh83