Add check for OSPS-DO-03: repo contains end-user documentation

Author: evankanderson

data-sources/ghapi.yaml

@@ -14,3 +14,13 @@ rest:
             type: string
           repo:
             type: string
+    repo:
+      endpoint: https://api.github.com/repos/{owner}/{repo}
+      parse: json
+      input_schema:
+        type: object
+        properties:
+          owner:
+            type: string
+          repo:
+            type: string

rule-types/github/osps-do-03.yaml

@@ -0,0 +1,87 @@
+---
+version: v1
+release_phase: alpha
+type: rule-type
+name: osps-do-03
+display_name: OSPS-DO-03 The project documentation MUST provide user guides for all basic functionality
+short_failure_message: No user guides or project documentation found
+severity:
+  value: low
+context:
+  provider: github
+description: |
+  Verifies that the project documentation provides a user guide
+guidance: |
+  This rule attempts to locate user guides from several project documentation sources.
+
+  Currently, this rule checks the following:
+
+  * The GitHub repository's public link
+  * A `docs` directory in the default branch of the repository with .md, .rst, .html or .txt files
+  * A `README.md` file containing preformatted text (triple-backtick) or the headings
+   "usage" or "getting started"
+
+  For more information, see [OpenSSF Security Baseline](https://baseline.openssf.org/#osps-do-03).
+def:
+  in_entity: repository
+  rule_schema: {}
+  ingest:
+    type: git
+  eval:
+    type: rego
+    data_sources:
+      - name: ghapi
+    rego:
+      type: deny-by-default
+      def: |
+        package minder
+
+        import rego.v1
+
+        default allow := false
+
+        repo := sprintf("%s/%s", [])
+
+        allow if {
+          # Check the GitHub homepage link
+          out = minder.datasource.ghapi.repo({
+            "owner": input.properties["github/repo_owner"],
+            "repo": input.properties["github/repo_name"]
+          })
+          out.homepage != ""
+        }
+
+        allow if {
+          # Check the docs directory
+          mdDocs := file.ls_glob("docs/*.md")
+          rstDocs := file.ls_glob("docs/*.rst")
+          htmlDocs := file.ls_glob("docs/*.html")
+          txtDocs := file.ls_glob("docs/*.txt")
+          count(mdDocs) + count(rstDocs) + count(htmlDocs) + count(txtDocs) > 0
+        }
+
+        readme := file.read("README.md")
+        allow if {
+          # Check the README.md file for preformatted text after the first line
+          regex.match("\n *```", readme)
+        }
+        allow if {
+          regex.match("\n#+ (?i:Usage|Getting Started)", readme)
+        }
+  remediate:
+    type: pull_request
+    pull_request:
+      title: "Add documentation to security-insights.yaml"
+      body: |
+        This is a Minder automated pull request.
+
+        This pull request links the discovered documentation in the security-insights.yaml file.
+      method: minder.yq.evaluate
+      params:
+        # TODO: need to be able to feed output from eval into remediate
+        expression: |
+          .documentation = [ "./README.md" ]
+        patterns:
+        # TODO: need to be able to create files as well as match existing files
+        - pattern: "SECURITY-INSIGHTS.yaml"
+          type: glob