refactor Security8021x to compatible QML classes

issue - #15

CmakeFiles

For the new editor, i have created a new module that will contain all the new C++ backend classes and QML files. Here is an overview

The new EditorQML will only be built if BUILD_EDITORQML is enabled.

Security8081x Security8021xSetting is a QObject with QML_ELEMENT. Each EAP method is a separate QML file (EapTls.qml, EapPeap.qml, etc.) that is only visible when the properties setting.showTls / setting.showPeap etc. is true. The securityType property drives which EAP methods appear in the menu by loading that specific qml. List of properties that is refactored/added from old Widget file security802-1x.cpp

Property	Type	Replaces
eapMethod	EapMethod (enum)	m_ui->auth->currentData().toInt()
securityType	SecurityType (enum)	Constructor Type parameter
PasswordOption	`PasswordOption (enum)	passwordOption that inherits PasswordField
showMd5	bool	currentAuthChanged() — setRowVisible(md5UserName, true)
showTls	bool	currentAuthChanged() — setRowVisible(tlsIdentity, true)
showLeap	bool	currentAuthChanged() — setRowVisible(leapUsername, true)
showPwd	bool	currentAuthChanged() — setRowVisible(pwdUsername, true)
showFast	bool	currentAuthChanged() — setRowVisible(fastAnonIdentity, true)
showTtls	bool	currentAuthChanged() — setRowVisible(ttlsAnonIdentity, true)
showPeap	bool	currentAuthChanged() — setRowVisible(peapAnonIdentity, true)
valid	bool	isValid()

Similarly, for each EAP, i have created its own properties. Few examples -

MD5

Property	Replaces
md5Username	m_ui->md5UserName->text()
md5Password	m_ui->md5Password->text()
md5PasswordOption	m_ui->md5Password->passwordOption()

Key design changes

• The Security8021x constructor is completely removed.
• The new backend sets m_securityType which shows which items to be shown.
• currentAuthChanged(int) changed to QML show properties.
• Every setRowVisible() call in currentAuthChanged is replaced by a QML property.
• Remaining static methods are kept intact.

Functions that are directly imported from old code

• pkcs12CanDecrypt is directly copied from security802-1x.cpp (https://invent.kde.org/plasma/plasma-nm/-/blob/master/libs/editor/settings/security802-1x.cpp#L273)