UI: Environment Variables For Each Copilot

[faltawy]

• Update Copilot options in page.tsx
• feat: Add useCallbackRef hook for memoizing callbacks
• chore: remove unused files
• style: disable button after click
• feat(ui): add SelectField component
• feat(actions): add PayloadType definition
• feat: Add selectedActions functionality
• chore: remove unused import
• refactor: Remove unnecessary import and empty line
• style(ui): update styles for SelectLabel and SelectItem, SheetContent
• feat(Renderer): Add Action Variables Drawer
• feat(ActionBlock): add selection and style changes
• Refactor socket event listener in Controller context
• Add ActionVariablesForm component and ActionVariablesDrawer component
• Add new component: AddActionDrawer
• Update Copilot options in page.tsx
• feat: Add useCallbackRef hook for memoizing callbacks
• chore: remove unused files
• style: disable button after click
• feat(ui): add SelectField component
• feat(actions): add PayloadType definition
• feat: Add selectedActions functionality
• chore: remove unused import
• refactor: Remove unnecessary import and empty line
• style(ui): update styles for SelectLabel and SelectItem, SheetContent
• feat(Renderer): Add Action Variables Drawer
• feat(ActionBlock): add selection and style changes
• Refactor socket event listener in Controller context
• Add ActionVariablesForm component and ActionVariablesDrawer component
• Add new component: AddActionDrawer
• Add createVariable and getVariables functions to copilot.ts
• Refactor CopilotsContainer styling
• Add SingleVariableForm and VariablesForm components
• Update styles in globals.css
• Add preload option for Open Sans font
• Add Global Variables to SettingsLayout
• Remove unused import statement
• Add GlobalVariablesPage component
• Add useVariables function to fetch variables for a specific copilot