Add full Chain 138 integration: 8 steps, chain spec, app-ethereum config, docs

Co-authored-by: Cursor <cursoragent@cursor.com>

README.md

@@ -1 +1,41 @@
-# LedgerLive
+# Ledger Chain 138 Integration — Generated Code for All 8 Steps
+
+**Purpose:** Drop-in or reference code for integrating Defi Oracle Meta Mainnet (Chain ID 138) with Ledger Wallet. Use after Ledger has accepted the integration request.
+
+**Reference:** [LEDGER_BLOCKCHAIN_INTEGRATION_COMPLETE.md](docs/LEDGER_BLOCKCHAIN_INTEGRATION_COMPLETE.md) | [ADD_CHAIN138_TO_LEDGER_LIVE.md](docs/ADD_CHAIN138_TO_LEDGER_LIVE.md) | [DEFI_ORACLE_META_MAINNET_PROJECT_DESCRIPTION.md](docs/DEFI_ORACLE_META_MAINNET_PROJECT_DESCRIPTION.md)
+
+---
+
+## Layout
+
+| Step | Path | Description |
+|------|------|-------------|
+| 1 | `step-01-currency/` | Cryptoassets currency entry for ledger-live |
+| 2 | `step-02-device-app-lib/` | App-ethereum network entry (patch/snippet) |
+| 3 | `step-03-coin-module/` | Coin-module skeleton (Ethereum family extension) |
+| 4 | `step-04-signer/` | Signer types and getAddress resolver |
+| 5 | `step-05-api/` | RPC/explorer config and network module |
+| 6 | `step-06-lld-llm/` | live-common setup and config |
+| 7 | `step-07-wallet-api/` | Wallet API family (validation, types, serializer) |
+| 8 | `step-08-manual-tests/` | Manual test plan and checklist script |
+
+**Additional files:**
+
+| Path | Description |
+|------|-------------|
+| `chains/eip155-138.json` | Chain spec for [ChainList](https://chainlist.org) / Ledger chains registry |
+| `app-ethereum/makefile_conf/chain/defi_oracle.mk` | Device app (nanos) build config for Chain 138 |
+| `docs/` | Full integration guide, project description, and Ledger form instructions |
+
+---
+
+## Gaps and missing integrations
+
+See **[GAPS_AND_MISSING_INTEGRATIONS.md](GAPS_AND_MISSING_INTEGRATIONS.md)** for test results, fixes applied (e.g. Step 3 Blockscout v2 API), and a checklist of possible missing pieces (tokens/CAL, swap, staking, Clear Signing, i18n, E2E tests, etc.).
+
+## Usage
+
+1. Submit the [Ledger form](https://tally.so/r/mORpv8) and wait for approval.
+2. Fork/clone [LedgerHQ/ledger-live](https://github.com/LedgerHQ/ledger-live) and optionally [LedgerHQ/wallet-api](https://github.com/LedgerHQ/wallet-api).
+3. Copy or adapt the files from each step into the Ledger repos as instructed in the step README or comments.
+4. Run Step 8 manual tests before submitting to Ledger.