Minor changes

Add input variable for function timeout and execute lambda functions at least once after creation and changes to environment variables.

Add S3 bucket creation support

Destination S3 bucket is automatically created, if related input variable is omitted. Minor fixes regarding forwarding prefix to jwks module.

Add JWKS fetching support

Adds JWKS support by creating preconfigured openid-jwks-crawler module if enabled. JWKS json files are stored inside a subfolder named jwks. https://registry.terraform.io/modules/beranek1/openid-jwks-crawler/aws/latest

Initial release

Creates all necessary resources except the S3 bucket used for storing configurations, therefore an existing S3 bucket is required. S3 bucket creation will be added as an option sometime in the future.