fix: skip repo if no package manager found

[ricardojdsilva87]

Pull Request

Proposed Changes

• Fixes a bug introduced on this PR where if a repository did not had any package manager detected, the script continued and tried to modify an object that did not existed. The continue notation breaks the cycle to go to the next package manager.
• Makes this link more permanent referenced on this comment
• The following logic worked only if a REPOSITORY was set , not working with the ORGANIZATION configuration. Now a file always needs to exist locally, either on the repository where the action would run or locally on the computer, triggering an error if it does not exist and the DEPENDABOT_CONFIG_FILE is set
• Added detection for gradle and devcontainers package managers
• Needed tests were added

---------- coverage: platform darwin, python 3.13.0-final-0 ----------
Name                 Stmts   Miss  Cover   Missing
--------------------------------------------------
auth.py                 28      0   100%
dependabot_file.py      90      0   100%
env.py                 134      4    97%   46-47, 167-168
evergreen.py           141      3    98%   311-312, 365
--------------------------------------------------
TOTAL                  393      7    98%

Required test coverage of 80% reached. Total coverage: 98.22%

Readiness Checklist

Author/Contributor

• If documentation is needed for this change, has that been included in this pull request
• run make lint and fix any issues that you have introduced
• run make test and ensure you have test coverage for the lines you are introducing
• If publishing new data to the public (scorecards, security scan results, code quality results, live dashboards, etc.), please request review from @jeffrey-luszcz

Reviewer

• Label as either fix, documentation, enhancement, infrastructure, maintenance or breaking