Make the resource and param input interactively

This will add the feature of resource and
param input interactively based on the pipeline
spec.

If user has privded resource or param input
by flag then interactive terminal will not start

Also support param as both array and string

Add respective test and docs

docs/cmd/tkn_pipeline_start.md

@@ -38,8 +38,8 @@ two parameters (foo and bar)
 ```
   -h, --help                          help for start
   -l, --last                          re-run the pipeline using last pipelinerun values
-  -p, --param strings                 pass the param
-  -r, --resource strings              pass the resource name and ref
+  -p, --param strings                 pass the param as key=value
+  -r, --resource strings              pass the resource name and ref as name=ref
   -s, --serviceaccount string         pass the serviceaccount name
       --task-serviceaccount strings   pass the service account corresponding to the task
 ```

docs/man/man1/tkn-pipeline-start.1

@@ -37,11 +37,11 @@ Parameters, at least those that have no default value
 
 .PP
 \fB\-p\fP, \fB\-\-param\fP=[]
-    pass the param
+    pass the param as key=value
 
 .PP
 \fB\-r\fP, \fB\-\-resource\fP=[]
-    pass the resource name and ref
+    pass the resource name and ref as name=ref
 
 .PP
 \fB\-s\fP, \fB\-\-serviceaccount\fP=""

pkg/cmd/pipeline/logs_testutil.go

@@ -24,6 +24,7 @@ import (
 	"github.com/AlecAivazis/survey/v2/terminal"
 	"github.com/Netflix/go-expect"
 	"github.com/stretchr/testify/require"
+	"github.com/tektoncd/cli/pkg/cli"
 )
 
 type promptTest struct {
@@ -46,6 +47,24 @@ func (opts *logOptions) RunPromptTest(t *testing.T, test promptTest) {
 	})
 }
 
+func (opts *startOptions) RunPromptTest(t *testing.T, test promptTest) {
+
+	test.runTest(t, test.procedure, func(stdio terminal.Stdio) error {
+		var err error
+		opts.askOpts = WithStdio(stdio)
+		opts.stream = &cli.Stream{
+			Out: stdio.Out,
+			Err: stdio.Err,
+		}
+		err = opts.run(test.cmdArgs[0])
+		if err != nil {
+			return err
+		}
+
+		return err
+	})
+}
+
 func stdio(c *expect.Console) terminal.Stdio {
 	return terminal.Stdio{In: c.Tty(), Out: c.Tty(), Err: c.Tty()}
 }