refactor(markdown_lint): move md linting to lint folder

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pages/projects/gitlab-ci/markdown_lint.md

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+---
+title: Markdown File Linting
+description: How to use No Fuss Computings gitlab-ci job for markdown linting
+date: 2021-08-11
+template: project.html
+about: https://gitlab.com/nofusscomputing/projects/gitlab-ci
+---
+
+This job lints markdown files as part of the validation CI stage. It is designated to run on all branches. If any errors are found, the generated JUnit test report will let you know what errors were found.
+
+You can include your linting rules in `.markdownlint.json` which should be within the root of your repository. for the available rules please see the [docs](https://github.com/DavidAnson/markdownlint/blob/main/README.md#rules--aliases).
+
+This job provides the following badge:
+
+- _None_
+
+## Dependencies
+
+- **Optional** file `.markdownlint.json` in repository root with any rules you wish to specify
+
+## your .gitlab-ci.yml changes
+To use this job add the following to your `.gitlab-ci.yml` file
+
+``` yaml
+
+stages:
+    - validation
+
+include:
+    - local: CI/validation/.gitlab-ci.yml
+
+Markdown Linting:
+  extends:
+    - .Lint_Markdown
+
+```
+
+## CI/CD Variables required
+
+| var name | Description |
+|:----:|:----|
+| MDLINT_PATH | **Optional** specifies the path to lint. defaults to `"**/*.md"` |
+| MDLINT_EXCLUDE_PATHS | **optional** Specifies the paths to exclude from linting. Defaults to `"!gitlab-ci"` |
+
+## Job Workflow
+
+1. installs the required job dependencies
+
+1. Lints any markdow file found in `$MDLINT_PATH`, excluding paths `$MDLINT_EXCLUDE_PATHS`
+
+## Artifacts
+
+- JUnit test report located at `$CI_PROJECT_DIR/artifacts/$CI_JOB_STAGE/tests/*.junit.xml`
+
+## License
+To view the license for this folder and any sub-folders, refer [here](https://gitlab.com/nofusscomputing/projects/gitlab-ci)