Threedigrid-builder

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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.

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- Handle embedded connection nodes. These are removed from the grid and written to a
new dataset "nodes_embedded".

- Fixed bug with cross sections tables being None in Grid instance

- Handle embedded channels, pipes and culverts. Embedded objects result in
embedded nodes and and lines with kcu LINE_1D_EMBEDDED between between 2D cells.

- Fixed a bug with lines that connect nodes to themselves in quadtree generation.

- Fixed a bug with wrong usage of lines.ds1d in bottom level and cross section weights
computation. The added attribute lines.s1d is now used, and for clarity nodes.ds1d
was renamed to nodes.s1d.

- Added invert_level_start_point and invert_level_end_point attributes to lines.

- Fixed coordinate order in lines.line_geometries field in gridadmin.h5.