Update UnitSymbol to switch method. Refactor Converts to Internal

[Chrisshort92]

Depends On

This change creates conflicts in Etabs & SAP Toolkits through the use of Adapter.Query() & Units.Query() . Both resolved in these PRs.

• Expand reference to resolve conflict ETABS_Toolkit#546
• expand reference to resolve conflict SAP2000_Toolkit#360

Issues addressed by this PR

Closes #180

Adds Query.UnitSymbol(Enum), returning the symbol for a BH.oM.Units member —
LengthUnit.Millimeter -> mm, AreaMomentOfInertiaUnit.CentimeterToTheFourth -> cm⁴.

It dispatches on the quantity and reuses the BHoM -> UnitsNet mapper that already backs the
conversions, so a symbol and a conversion can never disagree about which UnitsNet unit a BHoM unit
is. Those 22 mappers move from private to internal so Query can reach them. internal
publishes nothing — the Grasshopper harvest keys off public static.

Test files

https://burohappold.sharepoint.com/:f:/r/sites/BHoM/02_Current/12_Scripts/02_Pull%20Request/BHoM/Localisation_Toolkit/Units_Engine/%23178-add-fromunitstring-and-tounitstring-extension-methods-to-bhengineunits?d=wa31dff9fd66d429d82862958d7784b0d&csf=1&web=1&e=oFSP83

Changelog

• Added Query.UnitSymbol to Units_Engine, returning a unit's display symbol
• Convert's per-quantity unit mappers are now internal rather than private

Additional comments

ToPressureUnit was the only mapper declared this object unit. Inert while private, but as
internal it would publish an extension method on object across the assembly, so the this is
removed. Both call sites already used static-call syntax.

[Chrisshort92]

@BHoMBot check required

[bhombot-ci]

@Chrisshort92 to confirm, the following actions are now queued:

• check code-compliance
• check documentation-compliance
• check project-compliance
• check core
• check null-handling
• check serialisation
• check versioning
• check installer

There are 22 requests in the queue ahead of you.

[peterjamesnugent]

@BHoMBot check versioning

[bhombot-ci]

@peterjamesnugent to confirm, the following actions are now queued:

• check versioning

There are 18 requests in the queue ahead of you.

[peterjamesnugent]

@BHoMBot check versioning

[bhombot-ci]

@peterjamesnugent to confirm, the following actions are now queued:

• check versioning

There are 18 requests in the queue ahead of you.

[Chrisshort92]

@BHoMBot check installer

[bhombot-ci]

@Chrisshort92 to confirm, the following actions are now queued:

• check installer

There are 18 requests in the queue ahead of you.

[Chrisshort92]

@BHoMBot check versioning

[bhombot-ci]

@Chrisshort92 to confirm, the following actions are now queued:

• check versioning

There are 8 requests in the queue ahead of you.

[Chrisshort92]

@BHoMBot check versioning

[bhombot-ci]

@Chrisshort92 to confirm, the following actions are now queued:

• check versioning

There are 9 requests in the queue ahead of you.

[bhombot-ci]

The check versioning has already been run previously and recorded as a successful check. This check has not been run again at this time.

[peterjamesnugent]

Tested with the latest script, works for me.

[peterjamesnugent]

@BHoMBot check ready-to-merge

[bhombot-ci]

@peterjamesnugent to confirm, the following actions are now queued:

• check ready-to-merge

There are 2 requests in the queue ahead of you.