chore: added cliff.toml, release.toml and rustfmt.toml

cliff.toml

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+# git-cliff ~ configuration file
+# https://git-cliff.org/docs/configuration
+
+[changelog]
+# A Tera template to be rendered as the changelog's header.
+# See https://keats.github.io/tera/docs/#introduction
+header = """
+# Changelog\n
+All notable changes to this project will be documented in this file.\n
+"""
+# A Tera template to be rendered for each release in the changelog.
+# See https://keats.github.io/tera/docs/#introduction
+body = """
+{% if version %}\
+    ## {{ version | trim_start_matches(pat="v") }} - {{ timestamp | date(format="%Y-%m-%d") }}
+{% else %}\
+    ## Unreleased
+{% endif %}\
+{% for group, commits in commits | group_by(attribute="group") %}
+    ### {{ group | upper_first }}
+    {% for commit in commits %}
+        - {{ commit.message | split(pat="\n") | first | trim_end }}\
+    {% endfor %}
+{% endfor %}\n
+"""
+# A Tera template to be rendered as the changelog's footer.
+# See https://keats.github.io/tera/docs/#introduction
+footer = """
+<!-- generated by git-cliff -->
+"""
+# Remove leading and trailing whitespaces from the changelog's body.
+trim = true
+
+
+[git]
+# Parse commits according to the conventional commits specification.
+# See https://www.conventionalcommits.org
+conventional_commits = false
+# Exclude commits that do not match the conventional commits specification.
+filter_unconventional = false
+# Split commits on newlines, treating each line as an individual commit.
+split_commits = false
+# An array of regex based parsers for extracting data from the commit message.
+# Assigns commits to groups.
+# Optionally sets the commit's scope and can decide to exclude commits from further processing.
+commit_parsers = [
+    { message = "^feat", group = "Features" },
+    { message = "^fix", group = "Bug Fixes" },
+    { message = "^doc", group = "Documentation" },
+    { message = "^perf", group = "Performance" },
+    { message = "^refactor", group = "Refactor" },
+    { message = "^style", group = "Styling" },
+    { message = "^test", group = "Testing" },
+    { message = "^chore\\(release\\): prepare for", skip = true },
+    { message = "^chore", group = "Miscellaneous Tasks" },
+    { body = ".*security", group = "Security" },
+    { body = ".*", group = "Other (unconventional)" },
+]
+# Exclude commits that are not matched by any commit parser.
+filter_commits = false
+# Order releases topologically instead of chronologically.
+topo_order = false
+# Order of commits in each group/release within the changelog.
+# Allowed values: newest, oldest
+sort_commits = "oldest"

release.toml

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+pre-release-hook = ["git", "cliff", "-o", "CHANGELOG.md", "--tag", "{{version}}"]

rustfmt.toml

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+imports_granularity = "Crate"
+group_imports = "StdExternalCrate"