feat(sandbox): add stdin pipe support to exec command

- Add isPipedStdin() detection and sendStdinToSandbox() forwarding
- Modify execForeground/execBackground to support piped stdin
- Add pipe usage examples to exec command help
- Upgrade go-sdk to v7.26.4 (WithStdin, CloseStdin support)
- Remove replace directive for local go-sdk
- Move cli_comparison.md to qbox/sandbox project

Author: miclle

cmd/sandbox.go

@@ -344,6 +344,10 @@ var sandboxExecCmdBuilder = func(cfg *iqshell.Config) *cobra.Command {
   qshell sandbox exec sb-xxxxxxxxxxxx -- ls -la
   qshell sbx ex sb-xxxxxxxxxxxx -- ls -la
 
+  # Pipe stdin to a command
+  echo "hello world" | qshell sbx ex sb-xxxxxxxxxxxx -- cat
+  cat file.txt | qshell sbx ex sb-xxxxxxxxxxxx -- wc -l
+
   # Run in background (print PID and return)
   qshell sandbox exec sb-xxxxxxxxxxxx -b -- python server.py
   qshell sbx ex sb-xxxxxxxxxxxx -b -- python server.py

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/fatih/color v1.18.0
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/muesli/termenv v0.16.0
-	github.com/qiniu/go-sdk/v7 v7.26.3
+	github.com/qiniu/go-sdk/v7 v7.26.4
 	github.com/schollz/progressbar/v3 v3.8.6
 	github.com/spf13/cast v1.3.1
 	github.com/spf13/cobra v1.1.3
@@ -94,5 +94,3 @@ require (
 go 1.24.0
 
 toolchain go1.24.1
-
-replace github.com/qiniu/go-sdk/v7 => ../go-sdk

go.sum

@@ -334,8 +334,8 @@ github.com/prometheus/procfs v0.0.0-20190507164030-5867b95ac084/go.mod h1:TjEm7z
 github.com/prometheus/procfs v0.0.2/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/procfs v0.1.3/go.mod h1:lV6e/gmhEcM9IjHGsFOCxxuZ+z1YqCvr4OA4YeYWdaU=
 github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
-github.com/qiniu/go-sdk/v7 v7.26.3 h1:fU2TuLDzV06lfo25NIDd396h9QT+u0kGlZA2Q3RxIrM=
-github.com/qiniu/go-sdk/v7 v7.26.3/go.mod h1:ri7fGwbio0pRDFr8EK5TUpx0DbnpIMJ2bMSDxGWfCbk=
+github.com/qiniu/go-sdk/v7 v7.26.4 h1:D/k6cPbhjKvSx9hVBQSh97GuPu1ZtM3OLPCclSpusjo=
+github.com/qiniu/go-sdk/v7 v7.26.4/go.mod h1:ri7fGwbio0pRDFr8EK5TUpx0DbnpIMJ2bMSDxGWfCbk=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=