[v3.2] Add grafana dashboard importing API (#11)

* Add API to import grafana templates to kubesphere dashboard
* Merge and fix the latest codes from kubesphere #2501

Signed-off-by: zhu733756 <talonzhu@yunify.com>

vendor/github.com/rainycape/unidecode/make_table.go

@@ -0,0 +1,71 @@
+// +build none
+
+package main
+
+import (
+	"bytes"
+	"compress/zlib"
+	"encoding/binary"
+	"fmt"
+	"go/format"
+	"io/ioutil"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	data, err := ioutil.ReadFile("table.txt")
+	if err != nil {
+		panic(err)
+	}
+	var buf bytes.Buffer
+	for _, line := range strings.Split(string(data), "\n") {
+		if strings.HasPrefix(line, "/*") || line == "" {
+			continue
+		}
+		sep := strings.IndexByte(line, ':')
+		if sep == -1 {
+			panic(line)
+		}
+		val, err := strconv.ParseInt(line[:sep], 0, 32)
+		if err != nil {
+			panic(err)
+		}
+		s, err := strconv.Unquote(line[sep+2:])
+		if err != nil {
+			panic(err)
+		}
+		if s == "" {
+			continue
+		}
+		if err := binary.Write(&buf, binary.LittleEndian, uint16(val)); err != nil {
+			panic(err)
+		}
+		if err := binary.Write(&buf, binary.LittleEndian, uint8(len(s))); err != nil {
+			panic(err)
+		}
+		buf.WriteString(s)
+	}
+	var cbuf bytes.Buffer
+	w, err := zlib.NewWriterLevel(&cbuf, zlib.BestCompression)
+	if err != nil {
+		panic(err)
+	}
+	if _, err := w.Write(buf.Bytes()); err != nil {
+		panic(err)
+	}
+	if err := w.Close(); err != nil {
+		panic(err)
+	}
+	buf.Reset()
+	buf.WriteString("package unidecode\n")
+	buf.WriteString("// AUTOGENERATED - DO NOT EDIT!\n\n")
+	fmt.Fprintf(&buf, "var tableData = %q;\n", cbuf.String())
+	dst, err := format.Source(buf.Bytes())
+	if err != nil {
+		panic(err)
+	}
+	if err := ioutil.WriteFile("table.go", dst, 0644); err != nil {
+		panic(err)
+	}
+}