build: improve git-cliff CHANGELOG output

- Sort sections according to custom preference instead of
  alphabetically. It is ordered according to "most relevant" to "least
  relevant" to users.
- Sort commits alphabetically
- Don't uppercase the first letter of the commit message

scripts/cliff.toml

@@ -1,4 +1,4 @@
-# configuration file for git-cliff (0.1.0)
+# configuration file for git-cliff
 
 [changelog]
 # changelog header
@@ -7,7 +7,8 @@ header = """
 All notable changes to this project will be documented in this file.\n
 """
 # template for the changelog body
-# https://tera.netlify.app/docs/#introduction
+# https://github.com/Keats/tera
+# https://keats.github.io/tera/docs/
 body = """
 {% if version %}\
     ## [{{ version | trim_start_matches(pat="v") }}] - {{ timestamp | date(format="%Y-%m-%d") }}
@@ -15,25 +16,21 @@ body = """
     ## [unreleased]
 {% endif %}\
 {% for group, commits in commits | group_by(attribute="group") %}
-    ### {{ group | upper_first }}
-    {% for commit in commits%}\
+    ### {{ group | striptags | upper_first }}
+    {% for commit in commits | sort(attribute="message")%}\
         {% if not commit.scope %}\
-            - {{ commit.message | upper_first }}
+            - {{ commit.message }}
         {% endif %}\
     {% endfor %}\
     {% for group, commits in commits | group_by(attribute="scope") %}\
-        {% for commit in commits %}\
-            - **{{commit.scope}}**: {{ commit.message | upper_first }}
+        {% for commit in commits | sort(attribute="message") %}\
+            - **{{commit.scope}}**: {{ commit.message }}
         {% endfor %}\
     {% endfor %}
 {% endfor %}\n
 """
 # remove the leading and trailing whitespace from the template
 trim = true
-# changelog footer
-footer = """
-<!-- generated by git-cliff -->
-"""
 
 [git]
 # parse the commits based on https://www.conventionalcommits.org
@@ -48,16 +45,18 @@ commit_preprocessors = [
 ]
 # regex for parsing and grouping commits
 commit_parsers = [
-    { message = "!:", group = "Breaking"},
-    { message = "^feat", group = "Features"},
-    { message = "^fix", group = "Bug Fixes"},
-    { message = "^doc", group = "Documentation"},
-    { message = "^perf", group = "Performance"},
-    { message = "^refactor", group = "Refactor"},
-    { message = "^test", group = "Testing"},
-    { message = "^chore", group = "Miscellaneous Tasks"},
-    { message = "^build", group = "Build System"},
-    { message = "^Revert", group = "Reverted Changes"},
+    { message = "!:", group = "<!-- 0 -->Breaking"},
+    { message = "^feat", group = "<!-- 1 -->Features"},
+    { message = "^fix", group = "<!-- 2 -->Bug Fixes"},
+    { message = "^perf", group = "<!-- 3 -->Performance"},
+    { message = "^build", group = "<!-- 4 -->Build System"},
+    { message = "^vim-patch", group = "<!-- 5 -->Vim patches"},
+    { message = "^refactor", group = "<!-- 6 -->Refactor" },
+    { message = "^ci", group = "<!-- 8 -->CI" },
+    { message = "^test", group = "<!-- 9 -->Testing" },
+    { message = "^docs", group = "<!-- 99 -->Documentation" },
+    { message = "^revert", group = "<!-- 999 -->Reverted Changes" },
+    { message = ".*", group = "<!-- 9999 -->Other"},
 ]
 # filter out the commits that are not matched by commit parsers
 filter_commits = true