[bug/qa] Fix lint errors being ignored #485

[ssmadhavan006]

Checklist

• I have read the OpenWISP Contributing Guidelines.
• I have manually tested the changes proposed in this pull request.
• I have written new test cases for new code and/or updated existing tests for changes to existing code.
• I have updated the documentation.

Reference to Existing Issue

Closes #485.

Description of Changes

commit - fb32869

• Removed broken lint blocks from molecule/default/molecule.yml and molecule/local/molecule.yml
• Edited run-qa-checks script by adding yamllint and ansible-lint
• Add .yamllint.yml config to exclude virtual environments and and irrelevant files
• Update CI 'ci.yml' with continue-on-error: true and added Added conditional test execution based on dependency installation success
• Fixed indentation in molecule/resources/converge.yml
• Removed trailing spaces in vars/debian-13.yml
• Converted all YAML files from CRLF to LF line endings
• Lint errors are no longer ignored, failures properly reported

commit 986f466

• Updated Molecule callback configuration to replace deprecated yaml stdout_callback with
  ansible.builtin.default and result_format: yaml, resolving CI failures due to removal of
  community.general.yaml removal in v12+.

Screenshot

N/A