Create rule S6958: Literals should not be used as functions

rules/S6958/javascript/metadata.json

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+{
+}

rules/S6958/javascript/rule.adoc

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+== Why is this an issue?
+
+Calling a literal throws a TypeError, and is likely the result of an unintentional error in the code.
+
+This rule raises an issue when an attempt is made to use a literal as a function.
+
+
+[source,js]
+----
+true(); // Noncompliant, literal should not be used as function
+----
+
+This rule also detects when a literal is used as a _tag_ function.
+
+[source,js]
+----
+true``; // Noncompliant, literal should not be used as tag function
+----
+
+== Resources
+=== Documentation
+
+* MDN web docs - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions[Functions]
+* MDN web docs - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals[Template literals]

rules/S6958/metadata.json

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+{
+  "title": "Literals should not be used as functions",
+  "type": "BUG",
+  "code": {
+    "impacts": {
+      "RELIABILITY": "HIGH"
+    },
+    "attribute": "LOGICAL"
+  },
+  "status": "ready",
+  "remediation": {
+    "func": "Constant\/Issue",
+    "constantCost": "5min"
+  },
+  "defaultSeverity": "Critical",
+  "ruleSpecification": "RSPEC-6958",
+  "sqKey": "S6958",
+  "scope": "Main",
+  "defaultQualityProfiles": [
+    "Sonar way"
+  ],
+  "quickfix": "infeasible",
+  "tags": [
+  ]
+}