👷 misc: use git-sumi to lint commit messages

.github/workflows/git-sumi.yml

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+name: Lint pull request title
+
+on:
+  pull_request:
+    types:
+      - opened
+      - edited
+      - synchronize
+      - ready_for_review
+
+permissions:
+  pull-requests: read
+
+jobs:
+  main:
+    name: Run git-sumi
+    runs-on: ubuntu-latest
+    steps:
+      - uses: welpo/git-sumi-action@main
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

sumi.toml

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+# git-sumi ~ configuration file
+# Config: https://sumi.rs/docs/configuration
+# Rules: https://sumi.rs/docs/rules
+
+# Suppress progress messages.
+quiet = false
+
+# Shows the parsed commit message post-linting. See 'format' for options.
+display = true
+
+# Output format for the parsed commit message. Options: "cli", "json", "table", "toml".
+format = "cli"
+
+# Process each non-empty line in the commit message as an individual commit.
+split_lines = false
+
+# Rule: include one valid Gitmoji: https://gitmoji.dev/
+gitmoji = true
+
+# Rule: commit description must start with the specified case. Options: "any", "lower", "upper".
+description_case = "lower"
+
+# Rule: use the imperative mood in the description (e.g. "Fix bug" instead of "Fixed bug").
+imperative = true
+
+# Rule: do not end commit header with a period.
+no_period = true
+
+# Rule: limit the header to the specified length. A value of 0 disables this rule.
+max_header_length = 55
+
+# Rule: wrap the body at the specified length. A value of 0 disables this rule.
+max_body_length = 80
+
+# Rule: disallow leading/trailing whitespace and consecutive spaces.
+whitespace = true
+
+# Rule: follow Conventional Commits format: https://www.conventionalcommits.org/
+conventional = true
+
+# Rule: only allow the specified commit scopes. Example: ["docs", "cli"]. An empty list allows any scope.
+scopes_allowed = []
+
+# Rule: only allow the specified commit types. Example: ["feat", "fix"]. An empty list allows any type.
+types_allowed = ["feat", "fix", "docs", "refactor", "chore", "misc", "style"]
+
+# Rule: commit header must match the specified (regex) pattern. Example: '^JIRA-\d+:'
+header_pattern = '^([\p{Emoji_Presentation}\p{Extended_Pictographic}\u{200D}])' # The first character must be an emoji.