Maintenance data refactor

[jmdowrick]

Updated data structures to have the following structures:

module: {
moduleRef: ${module_type}:${module_subtype},
mathRef: ${component_file}:${component_name},
variables: [defined below],
ports: [defined below],
}

instance.data: {
name: '',
moduleRef: ${module_type}:${module_subtype},
mathRef: ${component_file}:${component_name},
variables: [defined below],
ports: [defined below],
handles: [defined below],
}

variables: {
name: '',
value: '',
units: '',
access: String with value 'access' or 'no_access',
type: String with value 'constant', 'global_constant', 'boundary_condition', or 'variable',
data_reference: '',
}

ports: {
portType: String with value 'general_port', 'entrance_port', or 'exit_port',
label: String of name,
variables: [list of variable names associated with the port], // note: different from variables above
multiportType: String with value 'None', 'Sum', or 'Multiply'
}

handles: {
uid: crypto.randomUUID(),
type: 'source' or 'target',
side: 'left', 'right', 'top', 'bottom'
name: string of instance name -> should probably be updated to be associated with an immutable node id
}

There should now be functions to build each of these data structures.

As you can see, constant parameters are now associated with the instance. Global constants remain in the library store. Also introduces a library proxy store that dictates the library area to support dynamic organisation.

The library is now broken into several maps:
availableCollections -> use mathRef to get a set of moduleRefs using the same math
availableModules -> use moduleRef as key to get the module with structure above
availableMath -> use mathRef as key to get raw xml string of model with a single component
availableUnits (not a map) -> array of units
globalConstants -> use variable name to get { value, units, data_reference }

This PR should fix the following issues:
Resolves #429
Resolves #413
Resolves #405
Resolves #290
Resolves #246
Resolves #248

Also works towars #380, but need ability to edit data reference in the parameter window before I feel comfortable to mark this resolved.

Remaining functionalities to restore:

• MacroBuilder - partially restored, but hit a wall with ghost nodes
• Build affine component generates warnings (pretty sure it's not implemented properly)
• EdgeConnectionDialog - autoscrolling up introduces offset between the mouse and the end of the connection proportional to the amount of autoscrolling (should be a simple fix, but I was unsure which measure to use to correct the offset) - related to issue Autoscroll up doesn't work in the edge connection dialog #417

[hsorby]

Looking really nice.

I have made a few comments.
Some a trivial, some are personal preference, and some are queries.
It would be good to answer the queries and make sure we are on the same page.

Other than that it is looking pretty awesome and much more logical.