dependabot: bump rich from 14.2.0 to 15.0.0

Bumps [rich](https://github.com/Textualize/rich) from 14.2.0 to 15.0.0.
- [Release notes](https://github.com/Textualize/rich/releases)
- [Changelog](https://github.com/Textualize/rich/blob/master/CHANGELOG.md)
- [Commits](Textualize/rich@v14.2.0...v15.0.0)

---
updated-dependencies:
- dependency-name: rich
  dependency-version: 15.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pyproject.toml

@@ -23,7 +23,7 @@ dependencies = [
     "gitpython==3.1.50",
     "transitions==0.9.3",
     "textual>=7.5.0",
-    "rich==14.2.0",
+    "rich==15.0.0",
     "python-frontmatter==1.3.0",
     "networkx==3.6.1",
 ]

requirements.txt

@@ -2,7 +2,7 @@ python-liquid2==0.3.0
 mistletoe==1.3.0
 python-frontmatter==1.3.0
 requests==2.34.0
-rich==14.2.0
+rich==15.0.0
 tiktoken==0.12.0
 PyYAML==6.0.3
 gitpython==3.1.50