Add the go.mod file

Author: liuzicheng1987

.gitignore

@@ -65,6 +65,7 @@
 !.github/**/*.yaml
 !benchmarks/**/*.json
 !docs/**/*.yaml
+!docs/**/*.mod
 
 # clangd
 compile_flags.txt

docs/go.mod

@@ -0,0 +1,5 @@
+module github.com/imfing/hextra-starter-template
+
+go 1.26
+
+require github.com/imfing/hextra v0.12.3 // indirect