A better dep-groups specificity breakdown

Trying to start organizing non-hard deps into groups with sensible
"domain names" as it were. I coulda sworn we originally had at least UI
libs setup this way.. musta got lost in prior nix(os) porting.

Specifics,
- move all Qt and `rapidfuzz` deps into the `uis` group.
- add a new `repl` group for all the `pdbp` (debugging utils) and
  `xonsh` (@goodboy's shell pref) related console related extensions.
- add a `testing` group for the harness' needs.
- add a `de` for (as of rn) TWM specific libs.
- nest all the new ^ groups in the `dev` group as needed.

pyproject.toml

@@ -75,12 +75,14 @@ dependencies = [
     "trio-typing>=0.10.0",
     "numba>=0.61.0",
     "pyvnc",
-    # TODO? mv to dev group?
-    "pdbp >=1.5.0, <2.0.0",
 ]
 # ------ dependencies ------
 
 
+# TODO: add an `--only daemon` group for running non-ui / pikerd
+# service tree in distributed mode B)
+# https://docs.astral.sh/uv/concepts/projects/dependencies/#optional-dependencies
+
 [dependency-groups]
 uis = [
     # https://docs.astral.sh/uv/concepts/projects/dependencies/#optional-dependencies
@@ -94,9 +96,9 @@ uis = [
     # for consideration,
     # - 'visidata'
 
-    # TODO: add an `--only daemon` group for running non-ui / pikerd
+    "qdarkstyle >=3.0.2, <4.0.0",
-    # service tree in distributed mode B)
+    "pyqt6 >=6.7.0, <7.0.0",
-    # https://docs.astral.sh/uv/concepts/projects/dependencies/#optional-dependencies
+    "pyqtgraph",
 ]
 
 # TODO: a toolset that makes debugging a `pikerd` service (tree) easy
@@ -107,17 +109,32 @@ uis = [
 #
 # console ehancements and eventually remote debugging extras/helpers.
 # use `uv --dev` to enable
-dev = [
+repl = [
-    "pytest",
+  # debug
-    "prompt-toolkit ==3.0.40",
+  "pdbp >=1.5.0, <2.0.0",
-    "cython >=3.0.0, <4.0.0",
     "greenback >=1.1.1, <2.0.0",
+  "xonsh",
+    "prompt-toolkit ==3.0.40",
     "pyperclip>=1.9.0",
-    # DE-specific
-    "i3ipc>=2.2.1",
 
-    # ?from git, see below.
+]
-    "xonsh",
+testing = [
+  "pytest",
+]
+de = [
+  # DE-specific
+  "i3ipc>=2.2.1",
+]
+dev = [
+  # https://docs.astral.sh/uv/concepts/projects/dependencies/#development-dependencies
+  "cython >=3.0.0, <4.0.0",
+
+  # nested deps-groups
+  # https://docs.astral.sh/uv/concepts/projects/dependencies/#nesting-groups
+  {include-group = 'uis'},
+  {include-group = 'repl'},
+  {include-group = 'testing'},
+  {include-group = 'de'},
 ]
 lint = [
   # XXX, with flake.nix needs to be from nixpkgs