feat: Add Admin Groups Management Module

- Introduced a new module for managing user groups (`usrgrp`) in the administration interface.
- Implemented CRUD operations for user groups: list, create, rename, and delete.
- Added authorization checks to ensure only users with appropriate permissions can manage groups.
- Created corresponding frontend JavaScript and SCSS files for the new module.
- Updated documentation to reflect the new group management functionality and its authorization model.
- Added SQL stored procedures for group management operations.
- Established a new login script for database access, ensuring proper security practices.

Fuchs/wwwroot/web/fis.usrgrp.min.css

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+.ugpfrm{padding:1.5rem 2rem}.ugpfrm .ugp_grid{border:1px solid #e2e2e2;border-radius:.5rem;background:#fff;box-shadow:0 1px 3px rgba(50,50,50,.1);overflow:hidden;max-width:32rem}.ugpfrm .ugp_row{display:grid;grid-template-columns:1fr;align-items:center;padding:.55rem 1rem;border-bottom:1px solid #eee}.ugpfrm .ugp_row:last-child{border-bottom:none}.ugpfrm .ugp_row_hd{background:#1b4379;color:#fff;font-weight:700;font-size:.85rem;text-transform:uppercase;letter-spacing:.02em;padding:.5rem 1rem}.ugpfrm .ugp_row:not(.ugp_row_hd){cursor:pointer;transition:background-color .12s ease-in-out}.ugpfrm .ugp_row:not(.ugp_row_hd):hover{background-color:#f3f6fb}.ugpfrm .ugp_row:not(.ugp_row_hd).selected{background-color:rgba(86,165,50,.12);box-shadow:inset 3px 0 0 #56a532}.ugpfrm .ugp_col_name{font-weight:600;color:#222}.ugpfrm .ugp_empty{padding:1.5rem 1rem;text-align:center;color:#777}.ugpfrm .ugp_err{padding:1rem 2rem;color:#b00020;font-weight:700}