…ease/3.4) (#21151)

**[SharovBot]**

## Summary

The `docs-site / build` CI job is failing on the latest `release/3.4`
commit (`071e4ae9`) because the `llms-full.txt` files are out of sync
after the May 2026 w20 documentation update (#21129).

## Root Cause

The [r3.4] docs: May 2026 w20 — v3.4.1 update commit modified
documentation pages but did not regenerate the LLMs text files. The
`docs-site / build` CI job runs `generate-llms.py` and checks if the
output matches the committed files — it fails when they differ.

## Fix

Ran `docs/site/scripts/generate-llms.py` and committed the updated
output:
- `llms-full.txt` (root)
- `docs/site/static/llms-full.txt`

Changes include 38 lines of documentation additions/corrections from the
w20 update.

## Testing

The `generate-llms.py` script ran successfully and produced consistent
output. This is a pure documentation file regeneration — no code
changes.

Co-authored-by: erigon-copilot[bot] <erigon-copilot[bot]@users.noreply.github.com>
Co-authored-by: Giulio Rebuffo <giulio.rebuffo@gmail.com>

## Summary

Brings the full `docs/site/` Docusaurus tree into `main`, incorporating
all documentation improvements developed against `release/3.4`.

**Scope:** `docs/site/**` + root `llms.txt` / `llms-full.txt` + removal
of superseded `docs/gitbook/` and `docs/gitbook-help/`. No changes to
Go, proto, or any non-docs source files.

### Included — merged to release/3.4

| PR | What |
|----|------|
| [erigontech#20883](erigontech#20883) | Docusaurus
v3 migration — full `docs/site/` tree, Docusaurus config, versioned v3.3
snapshot |
| [erigontech#20263](erigontech#20263) /
[erigontech#20264](erigontech#20264) | All v3.3
docs ported; branch/versioning convention established |
| [erigontech#20978](erigontech#20978) | Mobile
footer fix, SEO meta tags, OG image |
| [erigontech#20991](erigontech#20991) | Self-host
brand fonts (remove Google Fonts / CDN) |
| [erigontech#21000](erigontech#21000) | `llms.txt`
/ `llms-full.txt` generator script + root artifacts |
| [erigontech#21018](erigontech#21018) | May 2026
w19 maintenance — stale flags, broken links, accuracy fixes |
| [erigontech#21045](erigontech#21045) | CI:
docs-only path filter (skip Go jobs, run docs-site build) |
| [erigontech#21063](erigontech#21063) | `trace`
response fields reference + sync-monitoring guidance |
| [erigontech#21074](erigontech#21074) | Regenerate
`llms.txt` after sync-modes update |
| [erigontech#20997](erigontech#20997) | Brand font
consistency fix, installation page UX |

### Included — pending review on release/3.4

| PR | What |
|----|------|
| [erigontech#21030](erigontech#21030) | Automated
disk size pipeline: `update-disk-sizes.py`, `disk-sizes.json`,
`hardware-requirements.mdx` JSX fix, `generate-llms.py` `—` fallback,
unit tests |
| [erigontech#21129](erigontech#21129) | May 2026
w20 maintenance — `--caplin.nat`, `--caplin.columns-keep-slots`, RPC
subscription defaults, `nat.md` Caplin section, log.dir.verbosity
default |

### What changes on `main`

- `docs/site/` added (full Docusaurus tree, current v3.4 + frozen v3.3
snapshot)
- `docs/gitbook/` and `docs/gitbook-help/` removed (superseded by
Docusaurus)
- Root `llms.txt` and `llms-full.txt` updated to Docusaurus-generated
versions

> ⚠️ This PR does **not** remove `docs/gitbook/` yet — that cleanup will
be a separate commit once this PR is reviewed and approved.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Bloxster <bloxster@proton.me>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: lupin012 <58134934+lupin012@users.noreply.github.com>