Add in some dev deps for @goodboy

Namely since i use `xonsh` for a main shell, this includes adding it as
well as related tooling. Obvi bump the `uv.lock`.

Some other stuff retained from `poetry` days,
- add usage-comments around various (optional) deps.
- add toml section separator lines.
- go with 2-space indent.
- add comment on `trio>0.27` needed for py3.13+

uv.lock

@@ -1,4 +1,5 @@
 version = 1
+revision = 1
 requires-python = ">=3.11"
 
 [[package]]
@@ -252,6 +253,12 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/8a/0b/9fcc47d19c48b59121088dd6da2488a49d5f72dacf8262e2790a1d2c7d15/pygments-2.19.1-py3-none-any.whl", hash = "sha256:9ea1544ad55cecf4b8242fab6dd35a93bbce657034b0611ee383099054ab6d8c", size = 1225293 },
 ]
 
+[[package]]
+name = "pyperclip"
+version = "1.9.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/30/23/2f0a3efc4d6a32f3b63cdff36cd398d9701d26cda58e3ab97ac79fb5e60d/pyperclip-1.9.0.tar.gz", hash = "sha256:b7de0142ddc81bfc5c7507eea19da920b92252b548b96186caf94a5e2527d310", size = 20961 }
+
 [[package]]
 name = "pyreadline3"
 version = "3.5.4"
@@ -334,8 +341,10 @@ dev = [
     { name = "greenback" },
     { name = "pexpect" },
     { name = "prompt-toolkit" },
+    { name = "pyperclip" },
     { name = "pytest" },
     { name = "stackscope" },
+    { name = "xonsh" },
     { name = "xonsh-vox-tabcomplete" },
     { name = "xontrib-vox" },
 ]
@@ -356,8 +365,10 @@ dev = [
     { name = "greenback", specifier = ">=1.2.1,<2" },
     { name = "pexpect", specifier = ">=4.9.0,<5" },
     { name = "prompt-toolkit", specifier = ">=3.0.43,<4" },
+    { name = "pyperclip", specifier = ">=1.9.0" },
     { name = "pytest", specifier = ">=8.2.0,<9" },
     { name = "stackscope", specifier = ">=0.2.2,<0.3" },
+    { name = "xonsh", specifier = ">=0.19.1" },
     { name = "xonsh-vox-tabcomplete", specifier = ">=0.5,<0.6" },
     { name = "xontrib-vox", specifier = ">=0.0.1,<0.0.2" },
 ]