Jupyter-tikz

**🚨 Breaking Changes**

- Significant changes to Jinja2 rendering:
- Replaced the default Jinja2 syntax with a custom one to avoid clashes with LaTeX braces (`{}`). Please refer to the documentation for more details.
- With the new syntax, conflicts with LaTeX are significantly reduced, thus Jinja2 is now enabled by default and has become a mandatory dependency.
- Added a `--no-jinja` flag to allow optional disabling of Jinja2 rendering.

**🐞 Bug Fixes**

- Doc: Fixed social cards image links.

**✨ Improvements**

- Switched temporary file names to MD5 hashing for deterministic hashes.

**🚀 Features**

- Doc: Support to social cards (Twitter and Facebook OG).

**🐞 Bug Fixes**

- Fixed indentation in `TexDocument.tikz_code`.
- Fixed docs issues.

**🚀 Features**

- Added support for PGFPlots with external data files.
- Introduced a new flag (`-k`) to retain LaTeX temporary files.
- Added support for grayscale output in rasterized mode.
- Introduced new flags `--save-tikz` and `--save-pdf` to save the TikZ and PDF files respectively; `--save-tex` now explicitly saves the full LaTeX document.

**🚨 Breaking Changes**

- Modified the save functionality: Options must now be passed in `TexDocument.run_latex(...)` as `TexDocument.save()` is no longer used.
- LaTeX rendering is now performed in the current folder, moving away from the use of a temporary directory (`tempdir`). This change facilitates access to external files for PGFPlots.

**🐞 Bug Fixes**
- Improved documentation visibility on mobile devices.

**🐞 Bug Fixes**

- Fixed DOCs links