feat: implement versioning and release management in the project

- Added automatic versioning based on git tags using semantic-release in Gitea Actions.
- Introduced new API endpoints `GET /version` and `GET /v1/version` to expose build metadata.
- Updated Docker build process to include version and build time information in Go binaries.
- Enhanced documentation with details on release processes and versioning guidelines.
- Integrated version display in the web application for better user visibility.

docs/README.md

@@ -20,6 +20,7 @@
 | [api.md](api.md) | REST: префикс `/v1`, публичные маршруты, ссылки на OpenAPI |
 | [router-lists-ui-integration.md](router-lists-ui-integration.md) | Интеграция `router-lists-ui` с EvoBGP API (`DOMAINS/IP_RANGES/AS_PREFIXES/communities`) |
 | [access.md](access.md) | Выдача доступа: API-ключи, роли, нода, CORS |
+| [releasing.md](releasing.md) | Автоматические релизы, Conventional Commits, CI |
 | [openapi.yaml](openapi.yaml) | Источник правды по контракту API |
 | [OPENAPI-GITEA.md](OPENAPI-GITEA.md) | Как открыть HTML-документацию API (в т.ч. из Gitea) |
 | [evobgp-api-sketches.md](evobgp-api-sketches.md) | Ранний черновик идей API (контекст, не замена OpenAPI) |
@@ -40,3 +41,4 @@
 ## Репозиторий и CI
 
 - [../.gitea/README.md](../.gitea/README.md) — Gitea Actions, runner, сборка образов и push в Container Registry.
+- [releasing.md](releasing.md) — semantic-release, commit conventions, теги образов.