feat: add .core/ build and release configuration

Adopts go-devops build system for the core framework library.
Build config validates compilation across targets, release config
enables changelog generation for tag-only library releases.

Co-Authored-By: Virgil <virgil@lethean.io>

.core/build.yaml

@@ -0,0 +1,28 @@
+# Core Go Framework build configuration
+# Used by: core build
+# Note: This is a library module (no binary). Build validates compilation only.
+
+version: 1
+
+project:
+  name: core-go
+  description: Core Go Framework — dependency injection and lifecycle management
+  binary: ""
+
+build:
+  cgo: false
+  flags:
+    - -trimpath
+  ldflags:
+    - -s
+    - -w
+
+targets:
+  - os: linux
+    arch: amd64
+  - os: linux
+    arch: arm64
+  - os: darwin
+    arch: arm64
+  - os: windows
+    arch: amd64

.core/release.yaml

@@ -0,0 +1,24 @@
+# Core Go Framework release configuration
+# Used by: core ci
+# Library module — no binary artifacts, tag-only releases.
+
+version: 1
+
+project:
+  name: core-go
+  repository: core/go
+
+publishers: []
+
+changelog:
+  include:
+    - feat
+    - fix
+    - perf
+    - refactor
+  exclude:
+    - chore
+    - docs
+    - style
+    - test
+    - ci