chore: use static version in pyproject.toml

Remove pyproject.toml from release-please managed files and set
version to 0.0.0 since we don't publish to PyPI. This fixes the
CI build failure caused by release-please generating PEP 440
non-compliant versions like 5.0.0-alpha.20.1.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: dbrattli

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "Fable.Python"
-version = "5.0.0-alpha.20.1"
+version = "0.0.0"
 description = "Fable"
 authors = [{ name = "Dag Brattli", email = "[email protected]" }]
 requires-python = ">= 3.12, < 4"

release-please-config.json

@@ -8,14 +8,7 @@
       "bump-patch-for-minor-pre-major": true,
       "include-component-in-tag": false,
       "include-v-in-tag": true,
-      "changelog-path": "CHANGELOG.md",
-      "extra-files": [
-        {
-          "type": "toml",
-          "path": "pyproject.toml",
-          "jsonpath": "$.project.version"
-        }
-      ]
+      "changelog-path": "CHANGELOG.md"
     }
   }
 }