tools: add yamllint (#11)

.github/release-drafter.yaml

@@ -18,7 +18,7 @@ categories:
 change-template: '- $TITLE @$AUTHOR (#$NUMBER)'
 template: |
   Special thanks to the contributors that made this release happen: $CONTRIBUTORS
-  
+
   ## Full list of changes
 
   $CHANGES

.yamllint.yaml

@@ -0,0 +1,12 @@
+---
+ignore-from-file: [.gitignore]
+
+extends: default
+
+rules:
+  document-start: disable
+  float-values: enable
+  line-length: disable
+  octal-values: enable
+  truthy:
+    check-keys: false

tox.ini

@@ -59,14 +59,16 @@ deps =
     ruff==0.0.236
     # renovate: datasource=pypi
     codespell[tomli]>=2.2.2
+    # renovate: datasource=pypi
+    yamllint==1.29.0
 env_dir = {work_dir}/linting
 runner = ignore_env_name_mismatch
 
 [shellcheck]
 find = find {tox_root} \( -name .git -o -name .tox \) -prune -o -print
 filter = file --mime-type -Nnf- | grep shellscript | cut -f1 -d:
 
-[testenv:lint-{black,ruff,shellcheck,codespell}]
+[testenv:lint-{black,ruff,shellcheck,codespell,yaml}]
 description = Lint the source code
 base = testenv, lint
 labels = lint
@@ -79,6 +81,7 @@ commands =
     ruff: ruff --diff --respect-gitignore {posargs} .
     shellcheck: xargs -ra {env_tmp_dir}/shellcheck_files shellcheck
     codespell: codespell --toml {tox_root}/pyproject.toml {posargs}
+    yaml: yamllint {posargs} .
 
 [testenv:lint-{mypy,pyright}]
 description = Static type checking