Duplicated french doc to docs-en

docs-en/CHANGELOG.md

docs-en/avant-propos.md

docs-en/calculators/devalaison/grille-inclinee-b.jpg

docs-en/calculators/devalaison/grille-inclinee.jpg

docs-en/calculators/devalaison/grille-orientee.jpg

docs-en/calculators/devalaison/grille.md

docs-en/calculators/devalaison/jet.md

docs-en/calculators/devalaison/profil-barreaux.png

docs-en/calculators/hsl/courbe_remous.md

docs-en/calculators/hsl/pente.md

docs-en/calculators/hsl/regime_uniforme.md

docs-en/calculators/hsl/section_circulaire.png

docs-en/calculators/hsl/section_parametree.md

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docs-en/calculators/hsl/section_trapezoidale.png

docs-en/calculators/hsl/types_sections.md

docs-en/calculators/hsl/var_hydrauliques.md

docs-en/calculators/hyd_en_charge/cond_distri.md

docs-en/calculators/hyd_en_charge/cond_distri.png

docs-en/calculators/hyd_en_charge/lechapt-calmon.md