feat(cloudformation): cfn-lint configuration (aws#8362)

## Problem
- Allow for the ability to configure cfn-lint. Minimal impact to the
settings panel by using a nest object

## Solution


---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

Author: kddejong

packages/core/src/shared/settings-toolkit.gen.ts

@@ -62,6 +62,18 @@ export const toolkitSettings = {
     "aws.cloudformation.diagnostics.cfnLint.lintOnChange": {},
     "aws.cloudformation.diagnostics.cfnLint.delayMs": {},
     "aws.cloudformation.diagnostics.cfnLint.path": {},
+    "aws.cloudformation.diagnostics.cfnLint.customization": {
+        "ignoreChecks": {},
+        "includeChecks": {},
+        "mandatoryChecks": {},
+        "includeExperimental": {},
+        "configureRules": {},
+        "regions": {},
+        "customRules": {},
+        "appendRules": {},
+        "overrideSpec": {},
+        "registrySchemas": {}
+    },
     "aws.cloudformation.diagnostics.cfnGuard.enabled": {},
     "aws.cloudformation.diagnostics.cfnGuard.validateOnChange": {},
     "aws.cloudformation.diagnostics.cfnGuard.enabledRulePacks": {},

packages/toolkit/package.json

@@ -349,6 +349,82 @@
                     "default": "",
                     "description": "Path to locally installed cfn-lint executable. If empty, uses bundled version."
                 },
+                "aws.cloudformation.diagnostics.cfnLint.customization": {
+                    "type": "object",
+                    "default": {
+                        "includeChecks": [
+                            "I"
+                        ]
+                    },
+                    "description": "CFN-Lint customization options",
+                    "properties": {
+                        "ignoreChecks": {
+                            "type": "array",
+                            "items": {
+                                "type": "string"
+                            },
+                            "description": "Rule IDs to ignore"
+                        },
+                        "includeChecks": {
+                            "type": "array",
+                            "items": {
+                                "type": "string"
+                            },
+                            "description": "Only check these rule IDs"
+                        },
+                        "mandatoryChecks": {
+                            "type": "array",
+                            "items": {
+                                "type": "string"
+                            },
+                            "description": "Always check these rules"
+                        },
+                        "includeExperimental": {
+                            "type": "boolean",
+                            "description": "Include experimental rules"
+                        },
+                        "configureRules": {
+                            "type": "array",
+                            "items": {
+                                "type": "string"
+                            },
+                            "description": "Rule configurations (RuleId:key=value)"
+                        },
+                        "regions": {
+                            "type": "array",
+                            "items": {
+                                "type": "string"
+                            },
+                            "description": "AWS regions to validate against"
+                        },
+                        "customRules": {
+                            "type": "array",
+                            "items": {
+                                "type": "string"
+                            },
+                            "description": "Paths to custom rule files"
+                        },
+                        "appendRules": {
+                            "type": "array",
+                            "items": {
+                                "type": "string"
+                            },
+                            "description": "Additional rule directories"
+                        },
+                        "overrideSpec": {
+                            "type": "string",
+                            "description": "CloudFormation spec override file path"
+                        },
+                        "registrySchemas": {
+                            "type": "array",
+                            "items": {
+                                "type": "string"
+                            },
+                            "description": "CloudFormation Registry schema paths"
+                        }
+                    },
+                    "additionalProperties": false
+                },
                 "aws.cloudformation.diagnostics.cfnGuard.enabled": {
                     "type": "boolean",
                     "default": true,