Add documentation

Author: armano2

docs/rules/ban-types.md

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+# Enforces that types will not to be used (ban-types)
+
+Bans specific types from being used. Does not ban the corresponding runtime objects from being used.
+
+## Rule Details
+
+Examples of **incorrect** code for this rule `["String", "Use string instead"]`,
+
+```ts
+class Foo<F = String> extends Bar<String> implements Baz<String> {
+    constructor (foo: String) {
+    }
+
+    exit () : Array<String> {
+        const foo: String = 1 as String
+    }
+}
+```
+
+Examples of **correct** code for this rule `["String", "Use string instead"]`,
+
+```ts
+class Foo<F = string> extends Bar<string> implements Baz<string> {
+    constructor (foo: string) {
+    }
+
+    exit () : Array<string> {
+        const foo: string = 1 as string
+    }
+}
+```
+
+## Options
+```json
+{
+    "typescript/ban-types": ["error", {
+        "types": [
+            ["String", "Use string instead"]
+        ]
+    }]
+}
+```
+
+## Compatibility
+
+* TSLint: [ban-types](https://palantir.github.io/tslint/rules/ban-types/)