This commit adds a dedicated CLI-only executable and efibootmgr alias
as suggested in the second comment of issue #14.

Changes:
- Created qefibootmgr.cpp: Dedicated CLI-only executable
- Updated CMakeLists.txt to build qefibootmgr with minimal dependencies
  (Qt Core only, no GUI widgets)
- Added efibootmgr symlink installation on Unix-like systems
- Updated CLI_README.md to document the new executables

Benefits:
- qefibootmgr provides a lightweight CLI tool without GUI dependencies
- efibootmgr alias provides drop-in compatibility with standard efibootmgr
- Users can integrate into existing scripts that use efibootmgr
- Clear separation between GUI app and CLI tool

Usage:
  sudo qefibootmgr -v          # Use dedicated CLI tool
  sudo efibootmgr -v           # Use efibootmgr alias
  sudo QEFIEntryManager -v     # Use main app in CLI mode

Relates to #14

Signed-off-by: Inoki <veyx.shaw@gmail.com>

Updated the build system to create an efibootmgr executable on Windows
using the same source as qefibootmgr, instead of creating a separate
source file.

Changes:
- CMakeLists.txt: Build efibootmgr executable on Windows using
  qefibootmgr.cpp source
- CLI_README.md: Updated documentation to clarify Windows behavior
- Removed efibootmgr.cpp (not needed, reuse qefibootmgr.cpp)

On Windows, both qefibootmgr.exe and efibootmgr.exe are built from
the same source, providing drop-in compatibility without needing
symlinks (which require special permissions on Windows).

On Unix-like systems, efibootmgr remains as a symlink to qefibootmgr.

Relates to #14

Signed-off-by: Inoki <veyx.shaw@gmail.com>

This commit adds proper Windows administrator privilege handling for
the CLI executables by embedding UAC manifests.

Changes:
- CMakeLists.txt: Added UAC manifest for qefibootmgr and efibootmgr
  on Windows to request administrator elevation
- CLI_README.md: Added comprehensive Windows-specific documentation
  including UAC behavior, elevation requirements, and usage notes

Windows-specific improvements:
- Both CLI executables now include embedded manifests that trigger
  UAC elevation prompts automatically
- Documentation explains UAC behavior and scripting considerations

This ensures the CLI tools work correctly on Windows with proper
privilege elevation, matching the behavior of the GUI application.

Relates to #14

Signed-off-by: Inoki <veyx.shaw@gmail.com>

Replaced the markdown documentation with a proper Unix man page following
standard man page conventions.

Changes:
- Added qefibootmgr.8: Comprehensive man page for qefibootmgr/efibootmgr
  in standard groff format with all sections (NAME, SYNOPSIS, DESCRIPTION,
  OPTIONS, EXAMPLES, etc.)
- Removed CLI_README.md: Replaced with traditional man page documentation
- Updated CMakeLists.txt: Install man page to ${CMAKE_INSTALL_MANDIR}/man8
  on Unix-like systems

The man page includes:
- Complete option documentation compatible with efibootmgr
- Usage examples for common operations
- Platform-specific notes (Linux, FreeBSD, Windows)
- Exit status codes
- Compatibility notes
- Requirements and limitations

Users can now access documentation via:
  man qefibootmgr
  man efibootmgr

Relates to #14

Signed-off-by: Inoki <veyx.shaw@gmail.com>

This commit fixes all issues identified in code review that caused
CI build failures and would cause runtime problems.

Critical fixes:
1. Removed unused qefiloadoptioneditorview.h include from cli.cpp
   - This header depends on QtWidgets (QWidget base class)
   - qefibootmgr only links Qt::Core, not Qt::Widgets
   - Including it caused build failures in all CIs

2. Added destructor to CLI class to fix memory leak
   - QCoreApplication was allocated with new but never deleted
   - Added ~CLI() destructor to properly clean up

3. Fixed handleModifications() return logic
   - Was returning false when no modifications made (not an error!)
   - Caused exit code 1 on successful operations like "qefibootmgr -D"
     when no duplicates found
   - Now returns true for success, false only for actual errors

4. Added validation for conflicting options
   - Detect when both --active and --inactive are specified
   - Return error instead of silently preferring --active

5. Modernized CMake syntax
   - Replaced deprecated LINK_FLAGS property
   - Use target_link_options() for UAC manifest

All fixes tested and ready for CI re-run.

Fixes build failures in all CI platforms (Linux, Windows, FreeBSD).

Signed-off-by: Inoki <veyx.shaw@gmail.com>