Aws-cidr-finder

Fixed

* VPCs with no tags will no longer induce the `KeyError: 'Tags'` error from Boto (by [cooperwalbrun](https://github.com/cooperwalbrun))

Added

* Added Python-level API documentation to the `find_available_cidrs` function (by [cooperwalbrun](https://github.com/cooperwalbrun))

Added

* The `find_available_cidrs` function now includes a `cidrs_not_converted_to_prefix` key which contains a list of CIDRs that were skipped during the prefix conversion process (note: this is only applicable if passing `desired_prefix` to `find_available_cidrs`) (by [cooperwalbrun](https://github.com/cooperwalbrun))
* Python 3.12 is now an official build target with corresponding pipeline assurances (by [cooperwalbrun](https://github.com/cooperwalbrun))

Changed

* The `find_cidrs` function has been renamed to `find_available_cidrs` (by [cooperwalbrun](https://github.com/cooperwalbrun))

Added

* Added a Python-based API for using `aws-cidr-finder` in a programmatic fashion (by [cooperwalbrun](https://github.com/cooperwalbrun))

Changed

* The JSON format of `aws-cidr-finder`'s output is now simpler: the `aws-cidr-finder-messages` key has been changed to `messages`, `vpcs` has been changed to `data`, and the structure of `data` is now a flat list of "VPC" `dict`s where each `dict` has the following keys: `id`, `name`, `cidr`, and `available_cidr_blocks` (by [cooperwalbrun](https://github.com/cooperwalbrun))

Changed

* Messages relating to omitted prefixes during the handling of the `--prefix` argument will now indicate the VPC to which the omission corresponds (by [cooperwalbrun](https://github.com/cooperwalbrun))

Added

* Support for an optional `AWS_SESSION_TOKEN` environment variable is now implemented (by [cooperwalbrun](https://github.com/cooperwalbrun))

Fixed

* The `--profile` and `--region` CLI arguments now function as expected (by [cooperwalbrun](https://github.com/cooperwalbrun))
* All CIDRs for VPCs which were omitted during the handling of the `--prefix` flag are now logged as expected (by [cooperwalbrun](https://github.com/cooperwalbrun))