Rename popup classes to use consistent naming convention

[oblomov-dev]

Summary

This PR updates all references to popup classes to use a consistent naming convention, renaming classes from z2ui5_cl_pop_* to z2ui5_cl_popup_* throughout the codebase.

Key Changes

• Renamed class references:
  • z2ui5_cl_pop_to_confirm → z2ui5_cl_popup_to_confirm
  • z2ui5_cl_pop_error → z2ui5_cl_popup_error
  • z2ui5_cl_pop_get_range_m → z2ui5_cl_popup_get_range_m
• Updated all type declarations and method signatures in z2ui5_sql_cl_app_01 class
• Updated all type declarations and method implementations in zcl_2ui5_native_sql_console class and its local implementations
• Updated class identifier string in error_acknowledged_interaction from Z2UI5_CL_POP_ERROR to Z2UI5_CL_POPUP_ERROR
• Added dependency reference to the popups addon in abaplint.jsonc
• Updated README.md to document the new dependency on the popups addon

Implementation Details

• All changes maintain backward compatibility at the functional level - only class names are updated
• The renaming is applied consistently across both main application code and native SQL console implementation
• The popup addon is now explicitly declared as a dependency in the project configuration

https://claude.ai/code/session_01EUm2VFnKDYma7WNGyBT3qb