chore(deps): bump gp-sphinx 0.0.1a8 -> 0.0.1a9

why: Pick up the FastMCP prompts/resources autodoc surface and the
  companion typehints / theme / layout fixes shipped in gp-sphinx
  PR #21 (git-pull/gp-sphinx#21).
what:
- Bump every gp-sphinx workspace pin (gp-sphinx,
  sphinx-autodoc-api-style, sphinx-autodoc-pytest-fixtures) from
  0.0.1a8 to 0.0.1a9 in pyproject.toml
- uv.lock refreshed to match

Author: tony

pyproject.toml

@@ -52,9 +52,9 @@ Changes = "https://github.com/tmux-python/libtmux/blob/master/CHANGES"
 [dependency-groups]
 dev = [
   # Docs (via gp-sphinx)
-  "gp-sphinx==0.0.1a8",
-  "sphinx-autodoc-api-style==0.0.1a8",
-  "sphinx-autodoc-pytest-fixtures==0.0.1a8",
+  "gp-sphinx==0.0.1a9",
+  "sphinx-autodoc-api-style==0.0.1a9",
+  "sphinx-autodoc-pytest-fixtures==0.0.1a9",
   "sphinx-autobuild",
   "types-docutils",
   # Testing
@@ -75,9 +75,9 @@ dev = [
 ]
 
 docs = [
-  "gp-sphinx==0.0.1a8",
-  "sphinx-autodoc-api-style==0.0.1a8",
-  "sphinx-autodoc-pytest-fixtures==0.0.1a8",
+  "gp-sphinx==0.0.1a9",
+  "sphinx-autodoc-api-style==0.0.1a9",
+  "sphinx-autodoc-pytest-fixtures==0.0.1a9",
   "sphinx-autobuild",
 ]
 testing = [