refactor: rename the node from opencv-plot to dora-plot

The repository is dora-plot, but the package, the entrypoint, the manifest
name and the window title were all opencv-plot. Consumers wire the node by
`path:`, so the split name was visible in every dataflow.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018WLVZCFFcCH1EpTXGfS9aD

pyproject.toml

@@ -1,5 +1,5 @@
 [project]
-name = "opencv-plot"
+name = "dora-plot"
 version = "0.1.0"
 description = "Dora node that overlays bounding boxes and text on an image and displays it in an OpenCV window"
 readme = "README.md"
@@ -21,7 +21,7 @@ dependencies = [
 ]
 
 [project.scripts]
-opencv-plot = "opencv_plot.main:main"
+dora-plot = "dora_plot.main:main"
 
 [dependency-groups]
 dev = ["pytest >= 8.1", "ruff >= 0.9"]
@@ -31,7 +31,7 @@ requires = ["hatchling"]
 build-backend = "hatchling.build"
 
 [tool.hatch.build.targets.wheel]
-packages = ["opencv_plot"]
+packages = ["dora_plot"]
 
 [tool.ruff.lint]
 extend-select = ["D", "I", "N", "RET", "UP"]