feat: add githooks

[andreaangiolillo]

Description

Ticket: INTMDB-968

This PR adds git hooks to terraform and updated CONTRIBUTING.md

Type of change:

• Bug fix (non-breaking change which fixes an issue). Please, add the "bug" label to the PR.
• New feature (non-breaking change which adds functionality). Please, add the "enhancement" label to the PR.
• Breaking change (fix or feature that would cause existing functionality to not work as expected). Please, add the "breaking change" label to the PR.
• This change requires a documentation update
• Documentation fix/enhancement

Required Checklist:

• I have signed the MongoDB CLA
• I have read the contribution guidelines
• I have added tests that prove my fix is effective or that my feature works per HashiCorp requirements
• I have added any necessary documentation (if appropriate)
• I have run make fmt and formatted my code

Further comments

Install the hook

make link-git-hooks                                                                                                         1.20.3  3.1.1  16.18.0 bazel 5.4.0
==> Installing all git hooks...
find .git/hooks -type l -exec rm {} \;
find .githooks -type f -exec ln -sf ../../{} .git/hooks/ \;

Run

git commit -m "test"                                                                                                        1.20.3  3.1.1  16.18.0 bazel 5.4.0
Formatting go files
Checking the format of Terraform files
==> Checking that code complies with gofmt requirements...
~/workspace/terraform-provider-mongodbatlas/examples/Atlas_Database_Users ~/workspace/terraform-provider-mongodbatlas

===> Validating Syntax Example: ./examples/Atlas_Database_Users <===

~/workspace/terraform-provider-mongodbatlas
~/workspace/terraform-provider-mongodbatlas/examples/Federated-Settings ~/workspace/terraform-provider-mongodbatlas

===> Validating Syntax Example: ./examples/Federated-Settings <===

~/workspace/terraform-provider-mongodbatlas
~/workspace/terraform-provider-mongodbatlas/examples/MongoDB-Atlas-AWS-VPC-Peering ~/workspace/terraform-provider-mongodbatlas

===> Validating Syntax Example: ./examples/MongoDB-Atlas-AWS-VPC-Peering <===

~/workspace/terraform-provider-mongodbatlas
~/workspace/terraform-provider-mongodbatlas/examples/MongoDB-Atlas-GCP-VPC-Peering ~/workspace/terraform-provider-mongodbatlas

===> Validating Syntax Example: ./examples/MongoDB-Atlas-GCP-VPC-Peering <===

~/workspace/terraform-provider-mongodbatlas
~/workspace/terraform-provider-mongodbatlas/examples/atlas-advanced-cluster/global-cluster ~/workspace/terraform-provider-mongodbatlas

.........

===> Validating Syntax Example: ./examples/third-party-integration/datadog <===

~/workspace/terraform-provider-mongodbatlas
~/workspace/terraform-provider-mongodbatlas/examples/third-party-integration/prometheus-and-teams ~/workspace/terraform-provider-mongodbatlas

===> Validating Syntax Example: ./examples/third-party-integration/prometheus-and-teams <===

~/workspace/terraform-provider-mongodbatlas
Checking the format of website files
==> Checking website against linters...
[INTMDB-968 85c90a9f] test
 2 files changed, 2 insertions(+), 2 deletions(-)
~/workspace/terraform-provider-mongodbatlas  INTMDB-968 ⇡1 *27 !1 ❯                                                                                                                         6s  1.20.3  3.1.1  16.18.0 bazel 5.4.0

[AgustinBettati]

Might be worth adjusting CONTRIBUTING guide, similar to how git hook configuration is mentioned here https://github.com/mongodb/mongodb-atlas-cli/blob/master/CONTRIBUTING.md#building-and-testing

[andreaangiolillo]

@AgustinBettati Done. Ready for review

[AgustinBettati]

LGTM