feat(convert): allow fully offline HTML presentation (#440)

* feat(cli): allow offline HTML presentations

* feat(convert): allow fully offline HTML presentation

TODO: check if this is really the case, especially for nested dependencies?

Closes #438

* fix(cli): typo

* chore(fmt): auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* chore(tests): add tests

* fix(cli): use full path

* fix(tests): typo

* chore(ci): avoid specific kernel name

* fix ?

* chore(lib): simplify logic

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

docs/source/reference/magic_example.ipynb

@@ -78,9 +78,9 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "manim-slides",
+   "display_name": ".venv",
    "language": "python",
-   "name": "manim-slides"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
@@ -92,7 +92,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.6"
+   "version": "3.11.8"
   }
  },
  "nbformat": 4,