feat(cli): extend duration to longer units (#15040)

This PR is a proposal to improve the situation described in #14750 

For some precise commands - we would like to be able to use durations
bigger than hours, minutes..

This PR extends the Duration proposed by Go with : 
- `d` - a day or 24hours.
- `y` - a year or 365 days.

I also removed the default value for lifetime and instead fetch the
maxLifetime value from codersdk - so by default if no value set we use
the value defined in the config.

cli/tokens.go

@@ -46,7 +46,7 @@ func (r *RootCmd) tokens() *serpent.Command {
 
 func (r *RootCmd) createToken() *serpent.Command {
 	var (
-		tokenLifetime time.Duration
+		tokenLifetime string
 		name          string
 		user          string
 	)
@@ -63,8 +63,30 @@ func (r *RootCmd) createToken() *serpent.Command {
 			if user != "" {
 				userID = user
 			}
+
+			var parsedLifetime time.Duration
+			var err error
+
+			tokenConfig, err := client.GetTokenConfig(inv.Context(), userID)
+			if err != nil {
+				return xerrors.Errorf("get token config: %w", err)
+			}
+
+			if tokenLifetime == "" {
+				parsedLifetime = tokenConfig.MaxTokenLifetime
+			} else {
+				parsedLifetime, err = extendedParseDuration(tokenLifetime)
+				if err != nil {
+					return xerrors.Errorf("parse lifetime: %w", err)
+				}
+
+				if parsedLifetime > tokenConfig.MaxTokenLifetime {
+					return xerrors.Errorf("lifetime (%s) is greater than the maximum allowed lifetime (%s)", parsedLifetime, tokenConfig.MaxTokenLifetime)
+				}
+			}
+
 			res, err := client.CreateToken(inv.Context(), userID, codersdk.CreateTokenRequest{
-				Lifetime:  tokenLifetime,
+				Lifetime:  parsedLifetime,
 				TokenName: name,
 			})
 			if err != nil {
@@ -82,8 +104,7 @@ func (r *RootCmd) createToken() *serpent.Command {
 			Flag:        "lifetime",
 			Env:         "CODER_TOKEN_LIFETIME",
 			Description: "Specify a duration for the lifetime of the token.",
-			Default:     (time.Hour * 24 * 30).String(),
-			Value:       serpent.DurationOf(&tokenLifetime),
+			Value:       serpent.StringOf(&tokenLifetime),
 		},
 		{
 			Flag:          "name",