feat: add cchk.toml as the org-level base config for inherit_from

This cchk.toml serves as the shared base configuration that other
repositories can inherit via their own cchk.toml:

  inherit_from = "github:commit-check/.github:cchk.toml"

Local settings in each repo's config override the inherited values.

Author: shenxianpeng

cchk.toml

@@ -0,0 +1,23 @@
+[commit]
+# https://www.conventionalcommits.org
+conventional_commits = true
+subject_capitalized = false
+subject_imperative = true
+subject_max_length = 100
+subject_min_length = 5
+allow_commit_types = ["feat", "fix", "docs", "style", "refactor", "test", "chore", "ci"]
+allow_merge_commits = true
+allow_revert_commits = true
+allow_empty_commits = false
+allow_fixup_commits = true
+allow_wip_commits = false
+require_body = false
+require_signed_off_by = false
+ignore_authors = ["dependabot[bot]", "copilot[bot]", "pre-commit-ci[bot]", "coderabbitai[bot]"]
+
+[branch]
+# https://conventional-branch.github.io/
+conventional_branch = true
+allow_branch_types = ["feature", "bugfix", "hotfix", "release", "chore", "feat", "fix", "ai", "claude", "codex", "copilot", "cursor"]
+require_rebase_target = "main"
+ignore_authors = ["dependabot[bot]", "copilot[bot]", "pre-commit-ci[bot]", "shenxianpeng"]