Create rule S6778: Showcase RSPEC with 2 frameworks

rules/S6778/java/metadata.json

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+{
+  "title": "This is a rule showcasing a rule with mutliple frameworks",
+  "type": "CODE_SMELL",
+  "status": "ready",
+  "remediation": {
+    "func": "Constant\/Issue",
+    "constantCost": "5min"
+  },
+  "tags": [
+  ],
+  "defaultSeverity": "Major",
+  "ruleSpecification": "RSPEC-6778",
+  "sqKey": "S6778",
+  "scope": "All",
+  "defaultQualityProfiles": ["Sonar way"],
+  "quickfix": "unknown",
+  "code": {
+    "impacts": {
+      "MAINTAINABILITY": "HIGH",
+      "RELIABILITY": "MEDIUM",
+      "SECURITY": "LOW"
+    },
+    "attribute": "CONVENTIONAL"
+  }
+}

rules/S6778/java/rule.adoc

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+FIXME: add a description
+
+// If you want to factorize the description uncomment the following line and create the file.
+//include::../description.adoc[]
+
+== Why is this an issue?
+
+This rule is not really a rule, but a demonstration of the features from Asciidoc that can appear in a rule description.
+
+More specifically, its "How to fix it" section contains several frameworks.
+
+
+== How to fix it in Razor
+
+=== Code examples
+
+Some text for the Razor framework. Should be displayed in its own subtab.
+
+==== Noncompliant code example
+
+[source,text,diff-id=1,diff-type=noncompliant]
+----
+FIXME
+----
+
+==== Compliant solution
+
+[source,text,diff-id=1,diff-type=compliant]
+----
+FIXED
+----
+
+== How to fix it in Python Standard Library
+
+=== Code examples
+
+Some text for the Python Standard Library framework. Should be displayed in its own subtab.
+
+==== Noncompliant code example
+
+[source,text,diff-id=2,diff-type=noncompliant]
+----
+FIXME
+----
+
+==== Compliant solution
+
+[source,text,diff-id=2,diff-type=compliant]
+----
+FIXED
+----

rules/S6778/metadata.json

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+{
+}