chore: merge CI linting jobs (#5904)

* chore: merge CI linting jobs

* Merge the `markdown-lint-check` step into `lint`

* Rename `coder.yaml` to `ci.yaml`

* Improve casing of security workflow

* Remove unused workflows and merge into contrib

* Format ci.yaml

* Fix CodeQL language

* Fix github action name

.github/workflows/security.yaml

@@ -1,4 +1,4 @@
-name: "Security"
+name: "security"
 
 permissions:
   actions: read
@@ -26,7 +26,6 @@ concurrency:
 
 jobs:
   codeql:
-    name: CodeQL
     runs-on: ${{ github.repository_owner == 'coder' && 'ubuntu-latest-16-cores' || 'ubuntu-latest' }}
     strategy:
       fail-fast: false
@@ -73,7 +72,6 @@ jobs:
           category: "/language:${{matrix.language}}"
 
   trivy:
-    name: Trivy
     runs-on: ${{ github.repository_owner == 'coder' && 'ubuntu-latest-16-cores' || 'ubuntu-latest' }}
     steps:
       - uses: actions/checkout@v3