Display LN describtion in the IED plug-in

[DavoodSooran]

Is your feature request related to a problem? Please describe.
As an OpenSCD user, I would like the LN description to be visible in the IED browser to provide a clearer understanding of the Logical Node.

Describe the solution you'd like
Currently, the Substation plug-in provides comprehensive visibility into all essential attributes of LNode. However, the attributes specific to LN and LN0 are not yet accessible. We aim to enhance the IED browser by incorporating the visibility of LN and LN0 attributes. For instance, to access the Edit LNode dialog box, users need to select the desired Logical Node and then click on the Edit icon, prompting the appearance of the editing wizard. Please refer to the image below for a visual representation:

The current state of the IED plug-in lacks the functionality to showcase corresponding information for LN and LN0. In order to address this limitation and integrate the description of Logical Nodes, we propose the introduction of an edit button specifically for Logical Nodes within the IED browser. This enhancement can be achieved by incorporating an edit button alongside Logical Nodes in the IED browser interface, as illustrated below:

The addition of this edit button will empower users to access and modify information related to Logical Nodes, offering a more comprehensive and user-friendly experience within the IED browser.

It is essential to note that the LN and LN0 encompass various attributes that may be reflected in the SCL file. These attributes can be categorized as either Required or Optional.

The table below outlines the supported attributes along with their respective statuses for LN:

Attribute	Required or Optional
desc	optional
lnType	required
prefix	optional
lnClass	required
inst	required

The table below outlines the supported attributes along with their respective statuses for LN0:

Attribute	Required or Optional
desc	optional
lnType	required
lnClass	required
inst	required

Upon selecting the Edit icon of LLN0 or any other LNs, users will be presented with the Edit LN0 or Edit LN wizard interfaces. Notably, the 'desc' attribute, classified as optional according to the IEC standard, has been implemented as a toggle button. This design allows users the flexibility to enable or disable the 'desc' attribute as needed. When the 'desc' attribute is enabled within the wizard, it will be incorporated into the generated SCL file, as demonstrated in the illustration below. Furthermore, the 'desc' attribute will be visibly displayed alongside the Logical Node name in the IED browser. For a comprehensive understanding of the LPHD Logical Node, please refer to the details outlined below: