Add pyproject.toml to all packages (#758)

* Add pyproject.toml to all packages

* Improve the publishing workflow

.github/workflows/publish.yml

@@ -31,6 +31,8 @@ jobs:
         uses: pypa/gh-action-pypi-publish@release/v1
         with:
           repository-url: https://test.pypi.org/legacy/
+          skip-existing: true  # Allows repeating the action
+          attestations: false  # Otherwise an attestation is added to dist/
       - name: Install from TestPyPI
         timeout-minutes: 5
         shell: bash

pulser-core/pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools >= 64"]
+build-backend = "setuptools.build_meta"

pulser-pasqal/pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools >= 64"]
+build-backend = "setuptools.build_meta"

pulser-simulation/pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools >= 64"]
+build-backend = "setuptools.build_meta"

pyproject.toml

@@ -13,4 +13,8 @@ filterwarnings = [
     "error",
     # Except these particular warnings, which are ignored
     'ignore:A duration of \d+ ns is not a multiple of:UserWarning',
-    ]
+    ]
+
+[build-system]
+requires = ["setuptools >= 64"]
+build-backend = "setuptools.build_meta"