Fix Go module tracking and .NET detection

Author: cuihairu

.github/workflows/build-dotnet.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Detect .NET project
         id: detect
         run: |
-          if ls dotnet/*.sln dotnet/*.csproj >/dev/null 2>&1; then
+          if ls dotnet/*.sln >/dev/null 2>&1 || ls dotnet/*.csproj >/dev/null 2>&1; then
             echo "present=true" >> "$GITHUB_OUTPUT"
           else
             echo "present=false" >> "$GITHUB_OUTPUT"

.gitignore

@@ -50,6 +50,8 @@ modules.order
 Module.symvers
 Mkfile.old
 dkms.conf
+!go/go.mod
+!go/go.sum
 
 # debug information files
 *.dwo

go/go.mod

@@ -0,0 +1,3 @@
+module github.com/cuihairu/epoch/go
+
+go 1.24