refactor: add useQuery management on globalVariables CRUD

[Cristhianzl]

This pull request will change globalVariables CRUD to use useQuery.

✨ (App.tsx): Add useGetGlobalVariables hook to fetch global variables data
🔧 (addNeVariableButton.tsx): Replace registerGlobalVariable function with usePostGlobalVariables hook for adding new global variables
🔧 (inputGlobalComponent/index.tsx): Replace deleteGlobalVariable function with useDeleteGlobalVariables hook for deleting global variables
🔧 (authContext.tsx): Remove unused getGlobalVariables function and setGlobalVariables state from authContext
🔧 (constants.ts): Add VARIABLES constant for global variables endpoint
🔧 (index.ts): Remove getGlobalVariables, registerGlobalVariable, and deleteGlobalVariable functions from API index
✨ (variables/index.ts): Add use-delete-global-variables hook for deleting global variables
🔧 (use-delete-global-variables.ts): Implement useDeleteGlobalVariables hook for deleting global variables
✨ (use-get-global-variables.ts): Add functionality to fetch and set global variables from API
✨ (use-patch-global-variables.ts): Add functionality to update global variables via API patch request
✨ (use-post-global-variables.ts): Add functionality to create new global variables via API post request
📝 (index.tsx): Import useGetGlobalVariables hook to fetch global variables on login page
📝 (index.tsx): Call mutateGetGlobalVariables function to fetch global variables on successful login
📝 (index.tsx): Import useDeleteGlobalVariables hook to delete global variables on global variables page
📝 (index.tsx): Call mutateDeleteGlobalVariable function to delete selected global variables
📝 (index.tsx): Handle success and error cases for deleting global variables

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_{Last Modified at 31 Jul 24 17:44 UTC}

[lucaseduoli]

LGTM!