Proposal: Standardizing "tips" in `llms.txt` via crypto wallet addresses.

**Ref**: I wrote a small blog post with my idea [here](https://olshansky.info/posts/2025-10-02-why-we-should-add-crypto-wallets-to-llms-txt).

**Motivation**:
- Enable LLMs to tip content owners during training
- Enable LLMs to tip content owners during inference
- Motivate people to host content on their own domains
- Live up to the vision of "micropymanets" and "owning your own content" in an AI Engine Optimization (AEO) era

_tl;dr_ Standardizig this:

```markdown
## Leave a Tip

- Bitcoin Address: ...
- Ethereum Address: ...
- Litecoin Address: ...
- Dogecoin Address: ...
```

**Next Steps:** If this idea doesn't sound crazy, I'll put together a formal and more detailed PR w/ the details.

Read the linked blog post and the repository's existing llms.txt guidance first. The issue names no files or tests; done would be a formal, detailed PR defining the proposed tip-address standard and its integration with llms.txt.

Written by the indexing model from the issue text.