feat: add the cabledyn.project object model

CHANGELOG.md

@@ -10,6 +10,12 @@ All notable changes to CableDyn are recorded in this file. The format follows
 
 ### Added
 
+- `cabledyn.project`, a GUI-independent object model of a complete CableDyn model: typed,
+  unit-aware objects that refer to each other by reference, change events, undoable commands,
+  three validation layers ending in the native deck rules, deck import and export through
+  `DeckModel` (every repository deck reads and writes back to its canonical text), and the
+  `.cdproj` project file. Documented in the "Project object model" page.
+
 - Torsion of finite-EI lines in the standalone driver (condensed, quasi-static, uniform torque):
   `END CONNECTIONS` columns `TorsStiffness NxX NxY NxZ [Pretwist]`, a `motionFile` roll column,
   the torque returned to Rigid6 bodies, channels `Torq<L>N<J>`, `Twist<L>N<J>` and `Twist<L>`,

doc/conf.py

@@ -169,6 +169,31 @@ def _cmake_project_version() -> str:
     )
 ]
 
+nitpick_ignore += [
+    ("py:class", f"cabledyn.builder.{name}")
+    for name in (
+        "Attachment",
+        "Body",
+        "Control",
+        "EndConnection",
+        "EquivalentBuoyancy",
+        "ExternalLoad",
+        "Failure",
+        "Line",
+        "LineType",
+        "MoorDynBody",
+        "OptionSet",
+        "OutputList",
+        "Point",
+        "Rod",
+        "RodEnd",
+        "RodType",
+        "Section",
+        "SyropeIC",
+        "Turbine",
+    )
+]
+
 # -- LaTeX / PDF output ------------------------------------------------------
 
 # XeLaTeX handles the Unicode used throughout the manual (Greek symbols, arrows, the

doc/index.rst

@@ -221,6 +221,7 @@ as described in :doc:`citing`.
    python
    python_postprocessing
    api_python
+   project_model
    api_reference
 
 .. toctree::