Allow to set initial default branch name for new personal projects based on user profile settings
### Proposal Allow to set initial default branch name for new personal projects based on user profile settings. This feature already exist in GitHub [Managing the default branch name for your repositories](https://docs.github.com/en/github/setting-up-and-managing-your-github-user-account/managing-user-account-settings/managing-the-default-branch-name-for-your-repositories) but is missing in GitLab. Based on this comment https://gitlab.com/gitlab-com/gl-infra/delivery/-/issues/1356#note_517547108 currently it is possible only at the instance level (self-hosted) and the group-level. Official GitLab documentation also confirms this [Default branch](https://docs.gitlab.com/13.11/ee/user/project/repository/branches/default.html). ```plaintext currently users can change this both at the instance-level (for self-managed users) and at the group-level (both SaaS and self-managed users). ``` Related issues: - https://gitlab.com/gitlab-org/gitlab/-/issues/221164 - https://gitlab.com/gitlab-com/gl-infra/delivery/-/issues/1356 - https://gitlab.com/gitlab-org/gitlab/-/issues/331773
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