Python HUGR builder interface

[ss2165]

Will be necessary for python based HUGR generation.

• [x] DFG building
• [x] Deserialization
• [x] Op hierarchy
• [x] #1172
• [x] #1164
• [x] #1159
• [x] #1188
• [x] #1198
• [x] #1202
• [x] #1204
• [x] #1211
• [x] Turn asserts in to exceptions
• [x] #1213
• [x] #1214

Follow ups:

• 1242

• 1243

• 1244

• 1245

• 1215

[aborgna-q]

Waiting on the pytket-future API https://github.com/CQCL/tket2/issues/308

[ss2165]

The feature is now complete enough to do https://github.com/CQCL/guppylang/issues/257 so closing, follow ups are listed in description above.