Updated and formatted USAGE.md

[Gogotchuri]

This PR includes the following changes to the USAGE documentation.

• Added Emacs configuration with Eglot (A big shoutout to @cassandracomar for providing the working config)
• Updated IntelliJ docs to recommend using only the official extension for now.
• Fixed vim-lsp and YouCompleteMe configs (Disclaimer: I'm not confident in the vim-specific configs)
• Updated Neovim documentation with the latest configuration, which is also the simplest. I'm not proficient in Vim script and have only included the Lua configuration. If anyone feels strongly that we should include a Vim script version of the configuration or configuration for older versions of Neovim, new contributions are always welcome.
• Fixed the incorrect configuration link in the VSCode documentation.
• Added "Might require update" to BBEdit 14 config. Which I couldn't test.
• Added correct configuration for Kate and an additional section to get .tofu files working.
• I've removed Sublime Text from this documentation, since there is no built-in highlighting mode for Terraform or OpenTofu, and we do not have the resources to maintain additional extensions inside the Organization.

This PR will mostly resolve issues with the USAGE documentation, but we will still need to extend and update it with additional editors and up-to-date configs.

Resolves #48
Partially addresses #99

Checklist

• I have read the contribution guide.
• I have not used an AI coding assistant to create this PR.
• I have written all code in this PR myself OR I have marked all code I have not written myself (including modified code, e.g. copied from other places and then modified) with a comment indicating where it came from.
• I (and other contributors to this PR) have not looked at the Terraform source code while implementing this PR.
• If I'm releasing, I have read the releasing guide.

Go checklist

• I have run golangci-lint on my change and receive no errors relevant to my code.
• I have run existing tests to ensure my code doesn't break anything.
• I have added tests for all relevant use cases of my code, and those tests are passing.
• I have only exported functions, variables and structs that should be used from other packages.
• I have added meaningful comments to all exported functions, variables, and structs.

[yottta]

Looks good in general. Didn't test the configurations. If you can, would be nice to have those validated.

[diofeher]

🚀

I've approved it, just to unblock you after you fix the typo.