added print DBs table sizes (#10111)

Added command to print databases tables basic info. There are two
options :
- print all info: ./build/bin/diag dbs all
- print only populated tables and dbs: ./build/bin/diag dbs pop   

Here is example output:
![Screenshot 2024-04-28 at 21 38
18](https://github.com/ledgerwatch/erigon/assets/29065143/f0a04931-8d87-4c45-b71a-71d75404f3fc)


@taratorio if you want I can add flag which will print specific DB.

cmd/diag/db/db.go

@@ -0,0 +1,243 @@
+package db
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/ledgerwatch/erigon-lib/common"
+	"github.com/ledgerwatch/erigon/cmd/diag/flags"
+	"github.com/ledgerwatch/erigon/cmd/diag/util"
+	"github.com/urfave/cli/v2"
+)
+
+type DBInfo struct {
+	name   string
+	tables []BDTableInfo
+	count  int
+	size   string
+}
+
+type BDTableInfo struct {
+	Name  string
+	Count int
+	Size  uint64
+}
+
+var Command = cli.Command{
+	Name:      "databases",
+	Aliases:   []string{"dbs"},
+	ArgsUsage: "",
+	Subcommands: []*cli.Command{
+		{
+			Name:      "all",
+			Aliases:   []string{"a"},
+			Action:    printAllDBsInfo,
+			Usage:     "Print database tables info.",
+			ArgsUsage: "",
+			Flags: []cli.Flag{
+				&flags.DebugURLFlag,
+				&flags.OutputFlag,
+			},
+		},
+		{
+			Name:      "populated",
+			Aliases:   []string{"pop"},
+			Action:    printPopuplatedDBsInfo,
+			Usage:     "Print database tables info which is not empty.",
+			ArgsUsage: "",
+			Flags: []cli.Flag{
+				&flags.DebugURLFlag,
+				&flags.OutputFlag,
+			},
+		},
+	},
+	Description: ``,
+}
+
+func printAllDBsInfo(cliCtx *cli.Context) error {
+	data, err := AllDBsInfo(cliCtx)
+	if err != nil {
+		return err
+	}
+
+	switch cliCtx.String(flags.OutputFlag.Name) {
+	case "json":
+		bytes, err := json.Marshal(data)
+		if err != nil {
+			return err
+		}
+
+		fmt.Println(string(bytes))
+
+	case "text":
+		printDBsInfo(data)
+	}
+
+	return nil
+}
+
+func printPopuplatedDBsInfo(cliCtx *cli.Context) error {
+	data, err := AllDBsInfo(cliCtx)
+	if err != nil {
+		return err
+	}
+
+	// filter out empty tables
+	for i := 0; i < len(data); i++ {
+		tables := data[i].tables
+		for j := 0; j < len(tables); j++ {
+			if tables[j].Count == 0 {
+				tables = append(tables[:j], tables[j+1:]...)
+				j--
+			}
+		}
+		data[i].tables = tables
+	}
+
+	//filter out empty dbs
+	for i := 0; i < len(data); i++ {
+		if len(data[i].tables) == 0 {
+			data = append(data[:i], data[i+1:]...)
+			i--
+		}
+	}
+
+	switch cliCtx.String(flags.OutputFlag.Name) {
+	case "json":
+		bytes, err := json.Marshal(data)
+		if err != nil {
+			return err
+		}
+
+		fmt.Println(string(bytes))
+
+	case "text":
+		printDBsInfo(data)
+	}
+
+	return nil
+}
+
+func printDBsInfo(data []DBInfo) {
+	fmt.Print("\n")
+	fmt.Println("------------------------DBs-------------------")
+	fmt.Println("DB Name             Keys Count            Size")
+	fmt.Println("----------------------------------------------")
+	for _, db := range data {
+		nLen := len(db.name)
+		fmt.Print(db.name)
+		for i := 0; i < 20-nLen; i++ {
+			fmt.Print(" ")
+		}
+
+		fmt.Printf("%d", db.count)
+		for i := 0; i < 22-len(fmt.Sprint(db.count)); i++ {
+			fmt.Print(" ")
+		}
+
+		fmt.Printf("%s\n", db.size)
+	}
+
+	fmt.Print("\n")
+	fmt.Print("\n")
+
+	//db := data[0]
+	for _, db := range data {
+
+		nl := len(db.name)
+
+		dashCount := (60 - nl) / 2
+
+		for i := 0; i < dashCount; i++ {
+			fmt.Print("-")
+		}
+
+		//fmt.Printf(" %s ", db.name)
+		fmt.Print("\033[1m " + db.name + " \033[0m")
+
+		for i := 0; i < dashCount; i++ {
+			fmt.Print("-")
+		}
+		fmt.Print("\n")
+
+		//fmt.Println("------------------------------------------------------------")
+		fmt.Println("Table Name                        Keys Count            Size")
+		for i := 0; i < 60; i++ {
+			fmt.Print("-")
+		}
+		fmt.Print("\n")
+
+		for _, table := range db.tables {
+			nLen := len(table.Name)
+			fmt.Printf("%s", table.Name)
+			for i := 0; i < 34-nLen; i++ {
+				fmt.Print(" ")
+			}
+
+			fmt.Printf("%d", table.Count)
+			for i := 0; i < 22-len(fmt.Sprint(table.Count)); i++ {
+				fmt.Print(" ")
+			}
+
+			fmt.Printf("%s\n", common.ByteCount(table.Size))
+		}
+		fmt.Print("\n")
+	}
+}
+
+func AllDBsInfo(cliCtx *cli.Context) ([]DBInfo, error) {
+	data := make([]DBInfo, 0)
+
+	dbsNames, err := getAllDbsNames(cliCtx)
+	if err != nil {
+		return data, err
+	}
+
+	for _, dbName := range dbsNames {
+		tables, err := getDb(cliCtx, dbName)
+		if err != nil {
+			continue
+		}
+
+		tCount := 0
+		tSize := uint64(0)
+		for _, table := range tables {
+			tCount += table.Count
+			tSize += table.Size
+		}
+
+		dbInfo := DBInfo{
+			name:   dbName,
+			tables: tables,
+			count:  tCount,
+			size:   common.ByteCount(tSize),
+		}
+		data = append(data, dbInfo)
+	}
+
+	return data, nil
+}
+
+func getAllDbsNames(cliCtx *cli.Context) ([]string, error) {
+	var data []string
+	url := "http://" + cliCtx.String(flags.DebugURLFlag.Name) + "/debug/dbs"
+
+	err := util.MakeHttpGetCall(cliCtx.Context, url, &data)
+	if err != nil {
+		return data, err
+	}
+
+	return data, nil
+}
+
+func getDb(cliCtx *cli.Context, dbName string) ([]BDTableInfo, error) {
+	var data []BDTableInfo
+	url := "http://" + cliCtx.String(flags.DebugURLFlag.Name) + "/debug/dbs/" + dbName + "/tables"
+
+	err := util.MakeHttpGetCall(cliCtx.Context, url, &data)
+	if err != nil {
+		return data, err
+	}
+
+	return data, nil
+}

cmd/diag/main.go

@@ -11,6 +11,7 @@ import (
 	"github.com/ledgerwatch/log/v3"
 	"github.com/urfave/cli/v2"
 
+	"github.com/ledgerwatch/erigon/cmd/diag/db"
 	"github.com/ledgerwatch/erigon/cmd/diag/downloader"
 	"github.com/ledgerwatch/erigon/cmd/diag/stages"
 	"github.com/ledgerwatch/erigon/cmd/snapshots/sync"
@@ -31,6 +32,7 @@ func main() {
 	app.Commands = []*cli.Command{
 		&downloader.Command,
 		&stages.Command,
+		&db.Command,
 	}
 
 	app.Flags = []cli.Flag{}