feat: add missing core Django template snippets

[Copilot]

Several high-frequency Django template tags were absent from snippets/django-snippets.json, including CSRF tokens, block inheritance, i18n, and JS-framework interop helpers.

New snippets added to django-snippets.json

Prefix	Output	Use case
ptd-csrf	{% csrf_token %}	Form POST protection
ptd-sup	{{ block.super }}	Parent block content
ptd-com	{% comment "..." %}...{% endcomment %}	Multi-line comments
ptd-ver	{% verbatim %}...{% endverbatim %}	Escape Django rendering for Vue/React
ptd-trans	{% translate "..." %}	i18n string translation

README updated

Django-Specific Snippets reference table extended with the five new entries.

[Copilot]

✅ Ready to approve

The changes are low-risk snippet/README additions, with only minor consistency nits called out in review comments.

Note: this review does not count toward required approvals for merging.

Pull request overview

Adds several missing high-frequency Django template snippets to the extension’s Django-specific snippet catalog, and documents them in the README so users can discover the new prefixes.

Changes:

• Added five new Django snippets (ptd-csrf, ptd-sup, ptd-com, ptd-ver, ptd-trans) to snippets/django-snippets.json.
• Extended the Django-specific snippet table in README.md with the new entries.

File summaries

File	Description
snippets/django-snippets.json	Adds new Django tag snippets for CSRF, block inheritance, comments, verbatim blocks, and translation.
README.md	Documents the newly added Django snippet prefixes in the Django snippet reference table.

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 4
• Review effort level: Low

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