refactor(templates): update comment syntax to use Jinja2 style

Change comment syntax in template files from `# ##` to `# {# ... #}` to align with Jinja2 templating engine. This improves consistency and avoids potential conflicts with Copier configuration.

The new syntax:
1. Uses Jinja-native comment format for better IDE recognition
2. Maintains file type indicators for syntax highlighting
3. Adds proper Jinja comment termination with `-#}` where needed
4. Removes ambiguous `##` prefix that could conflict with other tools

Affected files:
- copier.yaml
- template/.config/copier/{{ _copier_conf.answers_file }}.jinja
- template/.readthedocs.yaml.jinja
- template/mkdocs.yaml.jinja
- template/pyproject.toml.jinja

Author: liblaf

.cspell.json

@@ -9,6 +9,7 @@
     "direnv",
     "dmypy",
     "elif",
+    "envops",
     "fieldz",
     "getattr",
     "hynek",

copier.yaml

@@ -8,8 +8,8 @@ _external_data:
   shared: "{{ answers_file_shared }}"
 
 _envops:
+  comment_start_string: "# {#"
   line_statement_prefix: "# %%"
-  line_comment_prefix: "# ##"
 
 _migrations: &migrations
   - rm --force --verbose '__builtins__.pyi'

template/.config/copier/{{ _copier_conf.answers_file }}.jinja

@@ -1,4 +1,4 @@
-# ## -*- mode: yaml; -*-
+# {#- -*- mode: yaml; -*- -#}
 # This file is @generated by <https://github.com/liblaf/copier-python>.
 # DO NOT EDIT!
 # prettier-ignore

template/.readthedocs.yaml.jinja

@@ -1,4 +1,4 @@
-# ## -*- mode: yaml; -*-
+# {#- -*- mode: yaml; -*- -#}
 # yaml-language-server: $schema=https://raw.githubusercontent.com/readthedocs/readthedocs.org/master/readthedocs/rtd_tests/fixtures/spec/v2/schema.json
 # This file is @generated by <https://github.com/liblaf/copier-python>.
 # DO NOT EDIT!

template/mkdocs.yaml.jinja

@@ -1,4 +1,5 @@
-# ## -*- mode: yaml; -*-
+# {#- -*- mode: yaml; -*- -#}
+
 INHERIT: .config/copier/mkdocs.yaml
 site_name: "{{ project_name }}"
 site_description: TODO

template/pyproject.toml.jinja

@@ -1,4 +1,4 @@
-# ## -*- mode: toml; -*-
+# {#- -*- mode: toml; -*- -#}
 #:schema https://json.schemastore.org/pyproject.json
 # ref: <https://packaging.python.org/en/latest/specifications/pyproject-toml/>