Hypergol page (#290)

* Hypergol page

* commit suggestion : « Hummingbird »

Co-authored-by: Fabien Cazenave <[email protected]>

* Commit suggestion : faisable

Co-authored-by: Fabien Cazenave <[email protected]>

* Update www/content/alternatives/hypergol/index.md

Co-authored-by: Fabien Cazenave <[email protected]>

* Update www/content/alternatives/hypergol/index.md

Co-authored-by: Fabien Cazenave <[email protected]>

* Update www/content/alternatives/hypergol/index.md

Co-authored-by: Fabien Cazenave <[email protected]>

* Fix a metric shit-ton of typos

Co-authored-by: Fabien Cazenave <[email protected]>

* More typos, a bit harder to fix with Github’ UI.

* É

* Nvim: `gqip` (80 chars per line)

* Apply suggestions from code review

Co-authored-by: Fabien Cazenave <[email protected]>

* Fix some problems + reworked the SVG.

* Moins de stagger.

* Navbar + SVG rework (again).

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Co-authored-by: Fabien Cazenave <[email protected]>
Co-authored-by: Aurélien Berra <[email protected]>