Threedigrid-builder

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- Fixed l1dtot (exclude 1D boundaries).

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- Raise SchematisationError on embedding linear objects that begin/end outside of 2D
domain. Added tests for edge cases.

- Fixed exchange_level (dpumax) for 1D2D lines attached to non-manhole connection nodes.
The exchange_level is now derived from the bank_levels of attached channels.

- Add discharge_coefficients for structures.

- Swap the order in lines.line for 1D2D lines. The order is now (2D, 1D).

- Fixed kcu for lines attached to 1D boundary conditions.

- Copy crest_level from v2_levee if a v2_connected_point refers to one.

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- Consistently write NaN (and not -9999.0) in gridadmin float datasets.

- Fix tests with GEOS 3.10.0

- Make 'meta' group complete.

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- Add storage_area to calculation nodes.

- Added ds1d_half to nodes.

- Added has_embedded to attrs.

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- Fixed nodes.is_manhole in the gridadmin output.

- Handle user-supplied 1D-2D lines (connected point / calculation point).

- Write initial_waterlevel for 1D nodes and add 'has_initial_waterlevels' to meta.

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- Added 1D boundary conditions.

- Added 2D boundary conditions.

- Enable compression in HDF5 output.

- Fixed 2D lines that connect a larger to a smaller cell in south east direction.