bug: mcp-go would panic for stdio tools if the tool outputs a really long line

[WingT]

Description

mcp-go would panic for stdio tools if the tool outputs a really long line

Code Sample

// Minimum code snippet to reproduce the issue
// Remove if not applicable

Logs or Error Messages

I got this panic stack

panic: runtime error: slice bounds out of range [:8192] with capacity 4096

goroutine 38 [running]:
bufio.(*Reader).ReadSlice(0x1400028c300, 0xa)
        /opt/homebrew/Cellar/go/1.24.4/libexec/src/bufio/bufio.go:355 +0x34c
bufio.(*Reader).collectFragments(0x1400028c300, 0xa)
        /opt/homebrew/Cellar/go/1.24.4/libexec/src/bufio/bufio.go:455 +0x6c
bufio.(*Reader).ReadString(0x1400028c300, 0xa)
        /opt/homebrew/Cellar/go/1.24.4/libexec/src/bufio/bufio.go:502 +0x50
github.com/mark3labs/mcp-go/client/transport.(*Stdio).readResponses(0x1400040c0c0)
        /Users/izzy/go/pkg/mod/github.com/mark3labs/mcp-go@v0.32.0/client/transport/stdio.go:170 +0x7c
github.com/mark3labs/mcp-go/client/transport.(*Stdio).Start.func1()
        /Users/izzy/go/pkg/mod/github.com/mark3labs/mcp-go@v0.32.0/client/transport/stdio.go:79 +0x38
created by github.com/mark3labs/mcp-go/client/transport.(*Stdio).Start in goroutine 1
        /Users/izzy/go/pkg/mod/github.com/mark3labs/mcp-go@v0.32.0/client/transport/stdio.go:77 +0x104
panic: runtime error: slice bounds out of range [:8192] with capacity 4096```

## Environment

 - Go version (see `go.mod`): go 1.24.3
 - mcp-go version (see `go.mod`): 0.32.0

## Possible Solution

Perhaps don't use bufio.Reader as stdin