chore: add git-cliff config for future changelogs (#573)

Git-cliff config which foollows keepchangelog format with mention of
contributors and separate block of first-time contributors

It will be used for the future releases

cliff.toml

@@ -0,0 +1,107 @@
+# git-cliff ~ configuration file
+# https://git-cliff.org/docs/configuration
+
+[changelog]
+# changelog header
+header = """
+# Changelog\n
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).\n
+"""
+# template for the changelog body
+# https://keats.github.io/tera/docs/#introduction
+body = """
+{%- macro remote_url() -%}
+  https://github.com/{{ remote.github.owner }}/{{ remote.github.repo }}
+{%- endmacro -%}
+
+{% if version -%}
+    ## [{{ version | trim_start_matches(pat="v") }}] - {{ timestamp | date(format="%Y-%m-%d") }}
+{% else -%}
+    ## [Unreleased]
+{% endif -%}
+
+### Details\
+
+{% for group, commits in commits | group_by(attribute="group") %}
+    #### {{ group | upper_first }}
+    {%- for commit in commits %}
+        - {{ commit.message | upper_first | trim }}\
+            {% if commit.github.username %} by @{{ commit.github.username }}{%- endif -%}
+            {% if commit.github.pr_number %} in \
+              [#{{ commit.github.pr_number }}]({{ self::remote_url() }}/pull/{{ commit.github.pr_number }}) \
+            {%- endif -%}
+    {% endfor %}
+{% endfor %}
+
+{%- if github.contributors | filter(attribute="is_first_time", value=true) | length != 0 %}
+  ## New Contributors
+{%- endif -%}
+
+{% for contributor in github.contributors | filter(attribute="is_first_time", value=true) %}
+  * @{{ contributor.username }} made their first contribution
+    {%- if contributor.pr_number %} in \
+      [#{{ contributor.pr_number }}]({{ self::remote_url() }}/pull/{{ contributor.pr_number }}) \
+    {%- endif %}
+{%- endfor %}\n
+"""
+# template for the changelog footer
+footer = """
+{%- macro remote_url() -%}
+  https://github.com/{{ remote.github.owner }}/{{ remote.github.repo }}
+{%- endmacro -%}
+
+{% for release in releases -%}
+    {% if release.version -%}
+        {% if release.previous.version -%}
+            [{{ release.version | trim_start_matches(pat="v") }}]: \
+                {{ self::remote_url() }}/compare/{{ release.previous.version }}..{{ release.version }}
+        {% endif -%}
+    {% else -%}
+        [unreleased]: {{ self::remote_url() }}/compare/{{ release.previous.version }}..HEAD
+    {% endif -%}
+{% endfor %}
+<!-- generated by git-cliff -->
+"""
+# remove the leading and trailing whitespace from the templates
+trim = true
+
+[git]
+# parse the commits based on https://www.conventionalcommits.org
+conventional_commits = true
+# filter out the commits that are not conventional
+filter_unconventional = true
+# process each line of a commit as an individual commit
+split_commits = false
+# regex for preprocessing the commit messages
+commit_preprocessors = [
+    # remove issue numbers from commits
+    { pattern = '\((\w+\s)?#([0-9]+)\)', replace = "" },
+]
+# regex for parsing and grouping commits
+commit_parsers = [
+    { message = "^.*: add", group = "Added" },
+    { message = "^.*: support", group = "Added" },
+    { message = "^.*: remove", group = "Removed" },
+    { message = "^.*: delete", group = "Removed" },
+    { message = "^test", group = "Fixed" },
+    { message = "^fix", group = "Fixed" },
+    { message = "^.*: fix", group = "Fixed" },
+    { message = "^.*", group = "Changed" },
+]
+# protect breaking changes from being skipped due to matching a skipping commit_parser
+protect_breaking_commits = false
+# filter out the commits that are not matched by commit parsers
+filter_commits = true
+# regex for matching git tags
+tag_pattern = "[0-9].*"
+# regex for skipping tags
+skip_tags = ""
+# regex for ignoring tags
+ignore_tags = ""
+# sort the tags topologically
+topo_order = false
+# sort the commits inside sections by oldest/newest order
+sort_commits = "oldest"