chore: initial commit

CLI to mint RS256 customer JWTs for the YAMA License Server. Thin shell over
licensing.Issue() in the YAMA Go server; consumed via local replace directive
during development.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,26 @@
+# Build artifacts
+*.exe
+*.test
+*.out
+yama-issue-token
+yama-issue-token-*
+
+# Secrets — never commit private keys or issued tokens
+*.pem
+*.key
+*.jwt
+license_priv*
+license_pub*
+token-*.jwt
+
+# Go
+vendor/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+
+# OS
+.DS_Store
+Thumbs.db