feat: object-oriented support for the cbuffer, npoint, pose and rgeometry temporal types

Add first-class PyMEOS classes for the four extended temporal type
families, mirroring the existing tpoint/ttext pattern and reusing the
exact pymeos_cffi backing functions (no reimplementation):

- main: TNpoint/TCbuffer/TPose/TRgeometry (+ Inst/Seq/SeqSet)
- collections: base value types Npoint/Cbuffer/Pose and their
  NpointSet/CbufferSet/PoseSet (rgeometry's base is a shapely geometry,
  reusing the existing GeometrySet)
- factory + package exports wired for all four families; tests added

TCbuffer additionally exposes the full spatial-relationship surface
MEOS provides for it (ever / always / temporal: contains, covers,
disjoint, within-distance, intersects, touches), mirroring TPoint.
Verified against the MEOS headers: MEOS defines no spatial-relationship
API for npoint, pose or rgeometry, so their relationship surface is
complete at zero by construction (documented, not excluded) -- each
type covers 100% of its real MEOS-backed surface.

The factory resolves the four type tags through the compiled binding
(`_meos_cffi.lib`, the same source pymeos_cffi builds its enums from),
so the build imports cleanly and the types activate even where
pymeos_cffi's MeosType enum does not yet wrap the cbuffer/pose/rgeometry
tags.

Where MEOS provides no backing function the method is omitted rather
than faked: notably trgeometry has no string input parser (built via
from_geometry_tpose / hexwkb).

Author: estebanzimanyi

pymeos/__init__.py

@@ -66,6 +66,22 @@
     "TGeogPointInst",
     "TGeogPointSeq",
     "TGeogPointSeqSet",
+    "TNpoint",
+    "TNpointInst",
+    "TNpointSeq",
+    "TNpointSeqSet",
+    "TCbuffer",
+    "TCbufferInst",
+    "TCbufferSeq",
+    "TCbufferSeqSet",
+    "TPose",
+    "TPoseInst",
+    "TPoseSeq",
+    "TPoseSeqSet",
+    "TRgeometry",
+    "TRgeometryInst",
+    "TRgeometrySeq",
+    "TRgeometrySeqSet",
     # temporal
     "Temporal",
     "TInstant",
@@ -86,6 +102,12 @@
     "GeoSet",
     "GeometrySet",
     "GeographySet",
+    "Npoint",
+    "NpointSet",
+    "Cbuffer",
+    "CbufferSet",
+    "Pose",
+    "PoseSet",
     # extras
     "TInterpolation",
     # aggregators

pymeos/collections/__init__.py

@@ -4,6 +4,9 @@
 from .time import *
 from .text import *
 from .geo import *
+from .npoint import *
+from .cbuffer import *
+from .pose import *
 
 __all__ = [
     "Set",
@@ -30,4 +33,10 @@
     "FloatSet",
     "FloatSpan",
     "FloatSpanSet",
+    "Npoint",
+    "NpointSet",
+    "Cbuffer",
+    "CbufferSet",
+    "Pose",
+    "PoseSet",
 ]

pymeos/collections/cbuffer/__init__.py

@@ -0,0 +1,4 @@
+from .cbuffer import Cbuffer
+from .cbufferset import CbufferSet
+
+__all__ = ["Cbuffer", "CbufferSet"]