Add rule @typescript-eslint/prefer-optional-chain

Author: Shinigami92

src/rules/typescript-eslint/index.d.ts

@@ -8,6 +8,7 @@ import type { NoParameterPropertiesRule } from './no-parameter-properties';
 import type { NoUnsafeAssignmentRule } from './no-unsafe-assignment';
 import type { NoUnusedVarsRule } from './no-unused-vars';
 import type { PreferNullishCoalescingRule } from './prefer-nullish-coalescing';
+import type { PreferOptionalChainRule } from './prefer-optional-chain';
 
 /**
  * All @typescript-eslint rules.
@@ -21,4 +22,5 @@ export type TypeScriptEslintRules = BanTsCommentRule &
   NoParameterPropertiesRule &
   NoUnsafeAssignmentRule &
   NoUnusedVarsRule &
-  PreferNullishCoalescingRule;
+  PreferNullishCoalescingRule &
+  PreferOptionalChainRule;

src/rules/typescript-eslint/prefer-optional-chain.d.ts

@@ -0,0 +1,22 @@
+import type { RuleConfig } from '../rule-config';
+
+/**
+ * Prefer using concise optional chain expressions instead of chained logical ands.
+ *
+ * @see [prefer-optional-chain](https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/docs/rules/prefer-optional-chain.md)
+ */
+export type PreferOptionalChainRuleConfig = RuleConfig<[]>;
+
+/**
+ * Prefer using concise optional chain expressions instead of chained logical ands.
+ *
+ * @see [prefer-optional-chain](https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/docs/rules/prefer-optional-chain.md)
+ */
+export interface PreferOptionalChainRule {
+  /**
+   * Prefer using concise optional chain expressions instead of chained logical ands.
+   *
+   * @see [prefer-optional-chain](https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/docs/rules/prefer-optional-chain.md)
+   */
+  '@typescript-eslint/prefer-optional-chain': PreferOptionalChainRuleConfig;
+}