Add bjt primitive

[LuighiV]

This a PR to include the support of BJT generation using glayout:

• Include layers in pdk
• Include valid sizes
• Method to create bjt (npn, pnp) programmatically
• Automatic routing with multiplier, implements similar macros as the fet (multiplier, _multiplier_array, npn, pnp)
• Arbitrary pattern for 2 dimension array

[msaligane]

@Nimok15 Can you please review this

[LuighiV]

Note: The model was tested with npn_05p00x05p00 and pnp_05p00x05p00 although can generate any of the valid models
Know issues:

• When using dummies the extracted view seems to short circuit with active elements
• Missing feature for generate netlist automatically

[msaligane]

@Nimok15 are you planning to review this?

[amisapta15]

This compiles and pass DRC. Merge recomended

[msaligane]

@LuighiV Can you please rename the autmos folder into something more telling? Like BJT_typeofexample