Add static pages (documentation & credits). Keep only one component for WP pages

...p/core/components/main/side-menu/side-menu.component.html

...ion/components/accessibility/accessibility.component.html

...ion/components/accessibility/accessibility.component.scss

.../components/accessibility/accessibility.component.spec.ts

...ation/components/accessibility/accessibility.component.ts

...torialisation/components/approach/approach.component.html

...torialisation/components/approach/approach.component.scss

...ialisation/components/approach/approach.component.spec.ts

...ditorialisation/components/approach/approach.component.ts

src/app/editorialisation/components/home/home.component.scss

src/app/editorialisation/components/index.ts

...n/components/legal-mentions/legal-mentions.component.html

...n/components/legal-mentions/legal-mentions.component.scss

...omponents/legal-mentions/legal-mentions.component.spec.ts

...ion/components/legal-mentions/legal-mentions.component.ts

...torialisation/components/site-map/site-map.component.html

...torialisation/components/site-map/site-map.component.scss

...ialisation/components/site-map/site-map.component.spec.ts

...ditorialisation/components/site-map/site-map.component.ts

...n/components/wordpress-page/wordpress-page.component.html