feat(dependencies): switch to Poetry

pyproject.toml

@@ -1,19 +1,20 @@
 [tool.poetry]
 name = "webexmemebot"
-version = "0.1.0"
+version = "0.0.0"  # Version is tracked by GitHub Releases
 description = "Webex-based meme generation bot using memegen.link."
 authors = ["luketainton"]
 readme = "README.md"
+package-mode = false
 
 [tool.poetry.dependencies]
 python = "^3.11.2"
 webex-bot = "^0.5.2"
 pillow = "^11.0.0"
-sentry-sdk = "^2.19.0"
 
 [tool.poetry.group.dev.dependencies]
 black = "^24.10.0"
 coverage = "^7.6.8"
+isort = "^5.13.2"
 pylint = "^3.2.6"
 pylint-exit = "^1.2.0"
 pytest = "^8.3.3"