feat: Add bucket schema management commands (#52)

* feat: update generated client to include schema-management APIs
* feat: implement interfaces to decode flags and CSV
* feat: implement decoders for different measurement schema column formats
* feat: extend bucket CLI commands to support schema type property
* feat: add CLI commands to manage measurement schema
* test: add unit tests for bucket schema create, update and list commands

internal/api/unmarshal_csv.go

@@ -0,0 +1,39 @@
+package api
+
+import (
+	"fmt"
+	"strings"
+)
+
+// UnmarshalCSV implements the gocsv.TypeUnmarshaller interface
+// for decoding CSV.
+func (v *ColumnSemanticType) UnmarshalCSV(s string) error {
+	types := []string{string(COLUMNSEMANTICTYPE_TIMESTAMP), string(COLUMNSEMANTICTYPE_TAG), string(COLUMNSEMANTICTYPE_FIELD)}
+	for _, t := range types {
+		if s == t {
+			*v = ColumnSemanticType(t)
+			return nil
+		}
+	}
+	return fmt.Errorf("%q is not a valid column type. Valid values are [%s]", s, strings.Join(types, ", "))
+}
+
+// UnmarshalCSV implements the gocsv.TypeUnmarshaller interface
+// for decoding CSV.
+func (v *ColumnDataType) UnmarshalCSV(s string) error {
+	types := []string{
+		string(COLUMNDATATYPE_INTEGER),
+		string(COLUMNDATATYPE_FLOAT),
+		string(COLUMNDATATYPE_BOOLEAN),
+		string(COLUMNDATATYPE_STRING),
+		string(COLUMNDATATYPE_UNSIGNED),
+	}
+
+	for _, t := range types {
+		if s == t {
+			*v = ColumnDataType(t)
+			return nil
+		}
+	}
+	return fmt.Errorf("%q is not a valid column data type. Valid values are [%s]", s, strings.Join(types, ", "))
+}