feat(goreleaser): add initial configuration for GoReleaser

- add `.goreleaser.yaml` for release automation
- add `dist` to gitignore

.gitignore

@@ -1 +1,3 @@
 ChronoTomato
+
+dist/

.goreleaser.yaml

@@ -0,0 +1,38 @@
+# vim: set ts=2 sw=2 tw=0 fo=cnqoj
+
+version: 2
+
+before:
+  hooks:
+    - rm -fr ./dist
+    - go mod tidy
+
+builds:
+  - goos:
+      - linux
+    goarch:
+      - amd64
+      - arm64
+    env:
+      - CGO_ENABLED=0
+
+upx:
+  - enabled: true
+    compress: best
+    lzma: true
+
+changelog:
+  use: gitea
+
+archives:
+  - format: binary
+
+release:
+  gitea:
+    owner: pomodoro
+    name: ChronoTomato
+  mode: replace
+
+gitea_urls:
+  download: http://git.smsvc.net
+  api: http://git.smsvc.net/api/v1