feat(install): allow to install hook locally with husky

[GG-HH]

Fixes #1143

Context

Trying to fix error #1143

What has been done

In case the git hooks path is the husky path, add the ggshield command in the husky configuration file

Validation

See issue

PR check list

• [x] As much as possible, the changes include tests (unit and/or functional)
• [x] If the changes affect the end user (new feature, behavior change, bug fix) then the PR has a changelog entry (see doc/dev/getting-started.md). If the changes do not affect the end user, then the skip-changelog label has been added to the PR.