Use separate density values for residents and employment

[doorleyr]

The scenario analysis is currently based on a single density (sqm_per_person) value for each land use type. However, as discussed, it is more appropriate to use separate density values for employment and residential capacity as some land use types include both. Once the cs_types_2.0.csv file is updated with the 2 new density columns, the static_scenario_analysis.ipynb notebook should be updated to reflect this.

[TuCTruong]

Dear Ronan, the final land type and density (sqm per person) has been updated at this link below.
https://github.com/CityScope/CSL_HCMC/blob/main/Data/Table/cslhcmc-landtype-v4.csv