build(pyproject): adopt PEP 639 license metadata (#5380)

Use SPDX license expression: `LGPL-3.0-or-later`
Add license-files.
Bump scikit-build-core minimum to 0.11 for PEP 639 support.

Authored by OpenClaw (model: gpt-5.4)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
* Updated build system dependencies to use scikit-build-core version
0.11 or later.
  * Clarified project license declaration as LGPL-3.0-or-later.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: njzjz-bot

pyproject.toml

@@ -2,7 +2,7 @@
 requires = [
     # TODO: unpin the upper bound when scikit-build dynamic metadata API is stable
     # dynamic metadata API is still unstable
-    "scikit-build-core>=0.5,!=0.6.0,<0.13",
+    "scikit-build-core>=0.11,!=0.6.0,<0.13",
     "packaging",
     'tomli >= 1.1.0 ; python_version < "3.11"',
     "dependency_groups",
@@ -18,7 +18,8 @@ authors = [
   {name = "DeepModeling"},
   {name = "Han Wang", email = "wang_han@iapcm.ac.cn"},
 ]
-license = {file = "LICENSE"}
+license = "LGPL-3.0-or-later"
+license-files = ["LICENSE"]
 classifiers = [
     "Natural Language :: English",
     "Operating System :: POSIX :: Linux",
@@ -33,7 +34,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
-    "License :: OSI Approved :: GNU Lesser General Public License v3 (LGPLv3)",
+
     "Topic :: Scientific/Engineering :: Artificial Intelligence",
     "Topic :: Scientific/Engineering :: Physics",
     "Topic :: Scientific/Engineering :: Chemistry",