[Feat]: Add an ability to use credentials file in project git repository

[ormig]

Is your feature request related to a problem? Please describe

No response

Describe the solution you'd like

Add an ability to use credentials file in project git repository.

[Projects] credentials.yaml

Contains Credential objects

<credential-usernamePassword>:
  type: usernamePassword
  data:
    username: string
    password: string
<credential-secret>:
  type: secret
  data:
    secret: string

Example:

customerName: ACME
projectName: ACME-bss
repositories:
  - type: envgeneInstance
    url: https://git.acme.com/instance
    token: instance-cred
  - region: offsite-cn
    type: pipeline
    url: https://git.acme.com/pipeline
    token: offsite-cn-pipeline-cred
  - region: offsite-mb
    type: pipeline
    url: https://git.acmemb.com/pipelines
    token: offsite-mb-pipeline-cred
  - type: envgeneTemplate
    url: https://git.acme.com/template
    token: template-cred
    branches:
      - r25.3
      - r25.4
envgeneTemplates:
  envgene-acme:
    - main
    - dt
    - dm

instance-cred:
  type: secret
  data:
    secret: "MGE3MjYwNTQtZGE4My00MTlkLWIzN2MtZjU5YTg3NDA2Yzk0MzlmZmViZGUtYWY4_PF84_ba"
template-cred:
  type: secret
  data:
    secret: "MGE3MjYwNTQtZGE4My00MTlkLWIzN2MtZjU5YTg3NDA2Yzk0MzlmZmViZGUtYWY4_PF84_bb"
offsite-cn-pipeline-cred:
  type: secret
  data:
    secret: "MGE3MjYwNTQtZGE4My00MTlkLWIzN2MtZjU5YTg3NDA2Yzk0MzlmZmViZGUtYWY4_PF84_bb"
offsite-mb-pipeline-cred:
  type: secret
  data:
    secret: "MGE3MjYwNTQtZGE4My00MTlkLWIzN2MtZjU5YTg3NDA2Yzk0MzlmZmViZGUtYWY4_PF84_bb"

Describe alternatives you've considered

No response

Additional information

No response