feat: add native Android/Termux binary support (#887)

feat: added android support for running with termux

Adds GOOS=android arm64 build to goreleaser and platform detection in npm postinstall.

Tested by contributor on Termux where os.platform() returns 'android' and Linux binaries fail due to bionic vs glibc.

.goreleaser.yml

@@ -43,6 +43,22 @@ builds:
       - -X main.Commit={{.Commit}}
       - -X main.Branch={{.Branch}}
 
+  - id: bd-android-arm64
+    main: ./cmd/bd
+    binary: bd
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - android
+    goarch:
+      - arm64
+    ldflags:
+      - -s -w
+      - -X main.Version={{.Version}}
+      - -X main.Build={{.ShortCommit}}
+      - -X main.Commit={{.Commit}}
+      - -X main.Branch={{.Branch}}
+
   - id: bd-darwin-amd64
     main: ./cmd/bd
     binary: bd
@@ -184,8 +200,8 @@ release:
   name_template: "v{{.Version}}"
   header: |
     ## beads v{{.Version}}
-    
-    Pre-compiled binaries for Linux, macOS (Intel & Apple Silicon), Windows (AMD64 & ARM64), and FreeBSD.
+
+    Pre-compiled binaries for Linux, macOS (Intel & Apple Silicon), Windows (AMD64 & ARM64), Android/Termux (ARM64), and FreeBSD.
     
     ### Installation