fix: Add commit and branch to bd version output (github #503)

- Update Makefile install target to extract and pass git commit/branch via ldflags
- Add -X main.Commit and -X main.Branch to all build configurations in .goreleaser.yml
- Create scripts/install.sh helper for explicit version control during installation
- Add comprehensive tests for commit/branch resolution and output formatting

Fixes github #503: 'bd version' now reports as-built commit hash and branch
information regardless of installation method (make install, go install, or
released binaries from goreleaser).

.goreleaser.yml

@@ -22,6 +22,8 @@ builds:
       - -s -w
       - -X main.Version={{.Version}}
       - -X main.Build={{.ShortCommit}}
+      - -X main.Commit={{.Commit}}
+      - -X main.Branch={{.Branch}}
 
   - id: bd-linux-arm64
     main: ./cmd/bd
@@ -38,6 +40,8 @@ builds:
       - -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
@@ -52,6 +56,8 @@ builds:
       - -s -w
       - -X main.Version={{.Version}}
       - -X main.Build={{.ShortCommit}}
+      - -X main.Commit={{.Commit}}
+      - -X main.Branch={{.Branch}}
 
   - id: bd-darwin-arm64
     main: ./cmd/bd
@@ -66,6 +72,8 @@ builds:
       - -s -w
       - -X main.Version={{.Version}}
       - -X main.Build={{.ShortCommit}}
+      - -X main.Commit={{.Commit}}
+      - -X main.Branch={{.Branch}}
 
   - id: bd-windows-amd64
     main: ./cmd/bd
@@ -82,6 +90,8 @@ builds:
       - -s -w
       - -X main.Version={{.Version}}
       - -X main.Build={{.ShortCommit}}
+      - -X main.Commit={{.Commit}}
+      - -X main.Branch={{.Branch}}
       - -buildmode=exe
 
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