fix: Move sphinx deps to main dependencies so .[docs] extra works on RTD

sphinx, sphinx-click, sphinx_rtd_theme, sphinx-copybutton were in dev group
but poetry extras only resolves packages from [tool.poetry.dependencies].

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: AndreRico

pyproject.toml

@@ -27,6 +27,10 @@ numpy = ">=1.24,<2.0"
 tzlocal = "^2.1"
 numpydoc = {version = "^1.1.0", optional = true}
 ipython = {version = "^8.24", optional = true}
+sphinx = {version = "^4.0.0", optional = true}
+sphinx-click = {version = "^4", optional = true}
+sphinx_rtd_theme = {version = "^0.5.0", optional = true}
+sphinx-copybutton = {version = "^0.3.0", optional = true}
 pandas-genomics = "^1.0.0"
 rpy2 = "^3.6.0"
 
@@ -40,10 +44,6 @@ flake8 = "^6"
 pytest-cov = "^2.12.1"
 pytest-xdist = "^2.3.0"
 black = ">=22"
-sphinx = {version = "^4.0.0", optional = true}
-sphinx-click = {version = "^4", optional = true}
-sphinx_rtd_theme = {version = "^0.5.0", optional = true}
-sphinx-copybutton = {version = "^0.3.0", optional = true}
 
 [tool.poetry.extras]
 docs = ["sphinx", "numpydoc", "sphinx_rtd_theme", "sphinx-copybutton", "ipython", "sphinx-click"]