Cfn-lsp-extra

No new features, the main change is an overhaul of how completions and hovers are sourced due to the deprecation of https://github.com/awsdocs/aws-cloudformation-user-guide and https://github.com/awsdocs/aws-sam-developer-guide.

- [2b45847](https://github.com/LaurenceWarne/cfn-lsp-extra/commit/2b4584776dba08d47e3f6f9bef410fecd0a00ac8) Implement completions for static keys, e.g. `Type`/`Properties`/`DeletionPolicy`/... for resources, `Description`/`Value`/`Export`/... for outputs
- [adf8ba4](https://github.com/LaurenceWarne/cfn-lsp-extra/commit/adf8ba426fd900849b72c9245195f4f71cc780b0) Hovers for intrinsic functions

- [1281b33](https://github.com/LaurenceWarne/cfn-lsp-extra/commit/d2f386c6adfb4f81138ca7e977b272870754c3bb) Update `cfn-lint` version (https://github.com/LaurenceWarne/cfn-lsp-extra/issues/8).
- [99701c4](https://github.com/LaurenceWarne/cfn-lsp-extra/commit/99701c42fa297bbd9456e6012bb0338a3cd5383b) Drop Python 3.7 support

- [a378823](https://github.com/LaurenceWarne/cfn-lsp-extra/commit/a378823c127b76abbf81bcf3d8ca6bfe5bf01fef) Fix for configuration error with Neovim (https://github.com/LaurenceWarne/cfn-lsp-extra/issues/7).

- [9e5416c](https://github.com/LaurenceWarne/cfn-lsp-extra/commit/9e5416cb282547d0bb428e525b80619286c74c98) `textDocument/definition` for `!GetAtt`s.
- [6826623](https://github.com/LaurenceWarne/cfn-lsp-extra/commit/682662354d52252716b3cba943fb77b527039a39) Completions for enum property values.
- [b10f249](https://github.com/LaurenceWarne/cfn-lsp-extra/commit/b10f249a72e49b0b240c21f11a63a440ba58be44) Support `textDocument/hover` for `!GetAtts`

- [5](https://github.com/LaurenceWarne/cfn-lsp-extra/pull/5) Respect `cfn-lint` config if it exists, thanks to [mbarneyjr](https://github.com/mbarneyjr)
- [445a824](https://github.com/LaurenceWarne/cfn-lsp-extra/commit/445a8248cd03b87c5292a361a6b17fc446cb797c) Fix for [#4](https://github.com/LaurenceWarne/cfn-lsp-extra/issues/4) - error with Python 3.11