Introduce office POI class (#1423)

Omitted values include:

* office=yes ... too generic
* office=vacant ... not really a POI
* deprecated values (like office=administrative)
* tags that don't have a clear meaning (like office=camping,
  office=healthcare, office=transport, office=design)
* tags where another tag is used more often, e.g:
  office=religion is used more often than office=parish
  office=construction_company is used more often than office=construction
  office=engineer is used more often than office=engineering

---------

Co-authored-by: Tomas Pohanka <TomPohys@gmail.com>

layers/poi/mapping.yaml

@@ -118,7 +118,66 @@ def_poi_mapping_leisure: &poi_mapping_leisure
 
 # office values , see http://taginfo.openstreetmap.org/keys/office#values
 def_poi_mapping_office: &poi_mapping_office
+  - accountant
+  - advertising_agency
+  - architect
+  - association
+  - bail_bond_agent
+  - charity
+  - company
+  - construction_company
+  - consulting
+  - cooperative
+  - courier
+  - coworking
   - diplomatic
+  - educational_institution
+  - employment_agency
+  - energy_supplier
+  - engineer
+  - estate_agent
+  - financial
+  - financial_advisor
+  - forestry
+  - foundation
+  - geodesist
+  - government
+  - graphic_design
+  - guide
+  - harbour_master
+  - health_insurance
+  - insurance
+  - interior_design
+  - it
+  - lawyer
+  - logistics
+  - marketing
+  - moving_company
+  - newspaper
+  - ngo
+  - notary
+  - physician
+  - political_party
+  - private_investigator
+  - property_management
+  - publisher
+  - quango
+  - religion
+  - research
+  - security
+  - surveyor
+  - tax_advisor
+  - taxi
+  - telecommunication
+  - therapist
+  - translator
+  - travel_agent
+  - tutoring
+  - union
+  - university
+  - water_utility
+  - web_design
+  - wedding_planner
 
 # railway values , see http://taginfo.openstreetmap.org/keys/railway#values
 def_poi_mapping_railway: &poi_mapping_railway