chore(release): clean up repo for v0.0.1 release

Excluded from release bundle:
- CONTEXT.md, CHANGELOG.md (agent/project working notes)
- client-app/ (React Native messenger — tracked separately)
- contracts/hello_go/ (unused standalone example)

Kept contracts/counter/ and contracts/name_registry/ as vm-test fixtures
(referenced by vm/vm_test.go; NOT production contracts).

Docs refactor:
- docs/README.md — new top-level index with cross-references
- docs/quickstart.md — rewrite around single-node as primary path
- docs/node/README.md — full rewrite, all CLI flags, schema table
- docs/api/README.md — add /api/well-known-version, /api/update-check
- docs/contracts/README.md — split native (Go) vs WASM (user-deployable)
- docs/update-system.md — new, full 5-layer update system design
- README.md — link into docs/, drop CHANGELOG/client-app references

Build-time version system (inherited from earlier commits this branch):
- node --version / client --version with ldflags-injected metadata
- /api/well-known-version with {build, protocol_version, features[]}
- Peer-version gossip on dchain/version/v1
- /api/update-check against Gitea release API
- deploy/single/update.sh with semver guard + 15-min systemd jitter

docs/development/README.md

@@ -85,19 +85,20 @@ contracts/
 ## Деплой контракта
 
 ```bash
-# Локально
 client deploy-contract \
-  --key key.json \
+  --key node.json \
   --wasm mycontract.wasm \
   --abi  mycontract_abi.json \
-  --node http://localhost:8081
+  --node http://localhost:8080
+```
 
-# В Docker
-docker exec node1 client deploy-contract \
-  --key /keys/node1.json \
+В Docker (single-node):
+```bash
+docker exec dchain /usr/local/bin/client deploy-contract \
+  --key /keys/node.json \
   --wasm /path/to/mycontract.wasm \
   --abi  /path/to/mycontract_abi.json \
-  --node http://node1:8080
+  --node http://localhost:8080
 ```
 
 Успешный деплой логирует `contract_id: <hex16>`.