Refactor getStaticPaths for the three section templates

[ViorelMocanu]

As a developer I would like to keep DRY.

Therefore, the getStaticPaths function needs a generic custom alias for the three contexts it's being abused in:

/pages/[section]/[...page].astro
- /pages/[section]/[category]/[...page].astro
  - /pages/[section]/[category]/[subcategory]/[...page].astro