Update bun guide

[FinnyMarigold58]

• Changes Node.js references to Bun
• Removes reference to env-cmd & node typings (unneeded)
• Provides updated code that works
• Updates links
• Changes env. to process.env.
• Fixes the "bun start" command at bottom of guide

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: 6d733e893a8c48fd840065dba904bbc044922613

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[pkg-pr-new[bot]]

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@buape/carbon

``` pnpm add https://pkg.pr.new/buape/carbon/@buape/carbon@111 ```

create-carbon

``` pnpm add https://pkg.pr.new/buape/carbon/create-carbon@111 ```

@buape/carbon-linked-roles

``` pnpm add https://pkg.pr.new/buape/carbon/@buape/carbon-linked-roles@111 ```

@buape/carbon-nodejs

``` pnpm add https://pkg.pr.new/buape/carbon/@buape/carbon-nodejs@111 ```

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commit: 6d733e8

[thewilloftheshadow]

@all-contributors add @FinnyMarigold58 for doc

[allcontributors[bot]]

@thewilloftheshadow

@FinnyMarigold58 already contributed before to doc

[thewilloftheshadow]

@allcontributors add @FinnyMarigold58 for ideas

(I'll adjust it manually)

[allcontributors[bot]]

@thewilloftheshadow

I've put up a pull request to add @FinnyMarigold58! :tada: