build: add cross-compile and release upload tasks

Amolith created 

Add Taskfile tasks for cross-compiled release builds:

- release:build: compiles for linux/{amd64,arm64}, darwin/{amd64,arm64},
windows/amd64, and freebsd/amd64 into dist/
- release:pack: UPX-compresses Linux binaries (~65% size reduction);
other targets lack 64-bit UPX support
- release:upload: hands off dist/* to the release fish function
- release:all: chains tag → build → pack → upload

Also adds dist/ to .gitignore and clean task.

Change summary

.gitignore    |  1 
Taskfile.yaml | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 55 insertions(+), 1 deletion(-)

Detailed changes

.gitignore 🔗 

@@ -5,4 +5,5 @@
 .crush
 .chunkhound
 lune
+dist/
 .task

Taskfile.yaml 🔗 

@@ -83,13 +83,66 @@ tasks:
   clean:
     desc: Remove build artifacts
     cmds:
-      - rm -rf lune
+      - rm -rf lune dist/
 
   clean-all:
     desc: Remove build artifacts and config.toml
     cmds:
       - rm -rf lune config.toml
 
+  release:build:
+    desc: Cross-compile for all release targets
+    vars:
+      TARGETS: >-
+        linux/amd64
+        linux/arm64
+        darwin/amd64
+        darwin/arm64
+        windows/amd64
+        freebsd/amd64
+    cmds:
+      - rm -rf dist
+      - mkdir -p dist
+      - for: {var: TARGETS, split: " "}
+        cmd: |
+          os=$(echo {{.ITEM}} | cut -d/ -f1)
+          arch=$(echo {{.ITEM}} | cut -d/ -f2)
+          ext=""; if [ "$os" = "windows" ]; then ext=".exe"; fi
+          echo "Building ${os}/${arch}..."
+          GOOS=${os} GOARCH=${arch} go build \
+            -o "dist/lune-{{.VERSION}}-${os}-${arch}${ext}" \
+            -ldflags "-s -w -X main.version={{.VERSION}}"
+
+  release:pack:
+    desc: Compress release binaries with UPX where supported
+    vars:
+      # UPX 5.x dropped macOS support; windows/amd64 is PE32 only and
+      # freebsd/amd64 is ELF32 only, so only Linux targets are packed.
+      PACK_TARGETS: >-
+        linux-amd64
+        linux-arm64
+    cmds:
+      - for: {var: PACK_TARGETS, split: " "}
+        cmd: |
+          bin="dist/lune-{{.VERSION}}-{{.ITEM}}"
+          if [ -f "$bin" ]; then
+            echo "Packing {{.ITEM}}..."
+            upx -q "$bin"
+          fi
+
+  release:upload:
+    desc: Upload release artifacts
+    cmds:
+      - fish -c 'release upload lune {{.VERSION}} --latest dist/*'
+
+  release:all:
+    desc: Tag, build, pack, and upload a release
+    cmds:
+      - task release
+      - task release:build
+      - task release:pack
+      - task release:upload
+
   release:
     desc: Interactive release workflow
     vars: