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.

deploy/docker/gobinary/Dockerfile

@@ -10,22 +10,38 @@ RUN --mount=type=cache,target=/go/pkg/mod,sharing=locked \
 
 FROM deps AS build-all
 COPY . .
+ARG VERSION=dev
+ARG GIT_SHA=unknown
+ARG BUILD_TIME=
 RUN --mount=type=cache,target=/go/pkg/mod,sharing=locked \
     --mount=type=cache,target=/root/.cache/go-build,sharing=locked \
     set -eux; \
     mkdir -p /out; \
     for d in cmd/*/; do \
       name="$(basename "$d")"; \
-      CGO_ENABLED=0 go build -trimpath -ldflags="-s -w" -o "/out/${name}" "./cmd/${name}"; \
+      CGO_ENABLED=0 go build -trimpath \
+        -ldflags="-s -w \
+          -X evobgp/internal/version.Version=${VERSION} \
+          -X evobgp/internal/version.GitSHA=${GIT_SHA} \
+          -X evobgp/internal/version.BuildTime=${BUILD_TIME}" \
+        -o "/out/${name}" "./cmd/${name}"; \
     done
 
 # Один бинарь (локальная сборка); в CI — build-all + runtime.
 FROM deps AS build
 COPY . .
 ARG BIN=evobgp-api
+ARG VERSION=dev
+ARG GIT_SHA=unknown
+ARG BUILD_TIME=
 RUN --mount=type=cache,target=/go/pkg/mod,sharing=locked \
     --mount=type=cache,target=/root/.cache/go-build,sharing=locked \
-    CGO_ENABLED=0 go build -trimpath -ldflags="-s -w" -o /out/evobgp "./cmd/${BIN}"
+    CGO_ENABLED=0 go build -trimpath \
+      -ldflags="-s -w \
+        -X evobgp/internal/version.Version=${VERSION} \
+        -X evobgp/internal/version.GitSHA=${GIT_SHA} \
+        -X evobgp/internal/version.BuildTime=${BUILD_TIME}" \
+      -o /out/evobgp "./cmd/${BIN}"
 
 FROM public.ecr.aws/docker/library/debian:bookworm-slim AS birdc
 ARG BIRD_VERSION=2.14