Add missing error types

[davidwood]

Prerequisites

• [x] I have written a descriptive issue title
• [x] I have searched existing issues to ensure the feature has not already been requested

🚀 Feature Proposal

The exported error types are missing several errors causing TypeScript compiler errors.

The following error types are not included in the error types (types/errors.d.ts)

• FST_ERR_LISTEN_OPTIONS_INVALID
• FST_ERR_ERROR_HANDLER_NOT_FN
• FST_ERR_ERROR_HANDLER_ALREADY_SET
• FST_ERR_DEC_UNDECLARED
• FST_ERR_LOG_INVALID_LOGGER_INSTANCE
• FST_ERR_LOG_INVALID_LOGGER_CONFIG
• FST_ERR_LOG_LOGGER_AND_LOGGER_INSTANCE_PROVIDED
• FST_ERR_REP_RESPONSE_BODY_CONSUMED
• FST_ERR_REP_READABLE_STREAM_LOCKED
• FST_ERR_PLUGIN_INVALID_ASYNC_HANDLER

The error types also includes the error FST_ERR_DEFAULT_ROUTE_INVALID_TYPE which does not have a corresponding error

Motivation

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Example

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