Cfn-lint

Features
- support for AWS::LanguageExtensions transform features including DeletionPolicy, UpdateReplacePolicy, Fn::Length and Fn::ToJsonString [docs](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference.html) (pull #[2339](https://github.com/aws-cloudformation/cfn-lint/pull/2339))
- Add rule [E1030](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E1030) to validate Fn::Length is configured correctly (pull [2339](https://github.com/aws-cloudformation/cfn-lint/pull/2339))
- Add rule [E1031](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E1030) to validate Fn::Length is configured correctly (pull [2339](https://github.com/aws-cloudformation/cfn-lint/pull/2339))

Features
- Create new API to allow for easier integration of using cfn-lint as a library [docs](https://github.com/aws-cloudformation/cfn-lint/blob/main/docs/getting_started/integration.md) (pull #[2285](https://github.com/aws-cloudformation/cfn-lint/pull/2285))
CloudFormation Specifications
- Update CloudFormation specs to `85.0.0` (pull [2324](https://github.com/aws-cloudformation/cfn-lint/pull/2324))
- Update Lambda deprecation dates (pull [2327](https://github.com/aws-cloudformation/cfn-lint/pull/2327))
Fixes
- Fix an issue with `RulesCollection` in which configurations would carry over between templates (pull [2331](https://github.com/aws-cloudformation/cfn-lint/pull/2331))
- Add used rules into `RulesCollection` so we can print all the used rules in JUnit and Pretty formatting (pull [2330](https://github.com/aws-cloudformation/cfn-lint/pull/2330))
- Update error message on [E3002](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E3002) (pull [2059](https://github.com/aws-cloudformation/cfn-lint/pull/2059))
- Update error description on [E1020](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E1020) (pull [2329](https://github.com/aws-cloudformation/cfn-lint/pull/2329))

CloudFormation Specifications
- Update CloudFormation specs to `83.0.0` (pull [2316](https://github.com/aws-cloudformation/cfn-lint/pull/2316))
Fixes
- Update rule [I3100](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#I3100) have proper path to resource (pull [2309](https://github.com/aws-cloudformation/cfn-lint/pull/2309))
- Update rule [E2503](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E2503) by removing `AllowedValues` for `AWS::ElasticLoadBalancingV2::LoadBalancer.LoadBalancerAttribute` (pull [2184](https://github.com/aws-cloudformation/cfn-lint/pull/2184))
- Update rule [E3002](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E3002) to include `<CommaDelimitedList` in SSM parameters (pull [2320](https://github.com/aws-cloudformation/cfn-lint/pull/2320))
- Update rule [I3013](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#I3013) to not flag on Aurora instances (pull [2317](https://github.com/aws-cloudformation/cfn-lint/pull/2317))

CloudFormation Specifications
- Update CloudFormation specs to `81.1.0` (pull [2308](https://github.com/aws-cloudformation/cfn-lint/pull/2308))

CloudFormation Specifications
- Update CloudFormation specs to `81.0.0` (pull [2306](https://github.com/aws-cloudformation/cfn-lint/pull/2306))
- Add `AWS::EC2::KeyPair` as a `Ref` for the value type `KeyPair` (pull [2305](https://github.com/aws-cloudformation/cfn-lint/pull/2305))

CloudFormation Specifications
- Update CloudFormation specs to `78.1.0` (pull [2292](https://github.com/aws-cloudformation/cfn-lint/pull/2292))
Fixes
- Add `utf-8` encoding to all `open` calls (pull [2298](https://github.com/aws-cloudformation/cfn-lint/pull/2298))