refactor: change the case of the flag manifest to camel case. (#19)

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## This PR
Changes the case of the flag manifest to camel case.

---------

Signed-off-by: Florin-Mihai Anghel <fanghel@google.com>
Signed-off-by: Florin-Mihai Anghel <44744433+anghelflorinm@users.noreply.github.com>

Author: anghelflorinm

docs/schema/v0/flag_manifest.json

@@ -36,16 +36,16 @@
           "$ref": "#/$defs/objectType"
         }
       ],
-      "required": ["flag_type", "default_value"]
+      "required": ["flagType", "defaultValue"]
     },
     "booleanType": {
       "type": "object",
       "properties": {
-        "flag_type": {
+        "flagType": {
           "type": "string",
           "enum": ["boolean"]
         },
-        "default_value": {
+        "defaultValue": {
           "type": "boolean"
         },
         "description": {
@@ -57,11 +57,11 @@
     "stringType": {
       "type": "object",
       "properties": {
-        "flag_type": {
+        "flagType": {
           "type": "string",
           "enum": ["string"]
         },
-        "default_value": {
+        "defaultValue": {
           "type": "string"
         },
         "description": {
@@ -73,11 +73,11 @@
     "integerType": {
       "type": "object",
       "properties": {
-        "flag_type": {
+        "flagType": {
           "type": "string",
           "enum": ["integer"]
         },
-        "default_value": {
+        "defaultValue": {
           "type": "integer"
         },
         "description": {
@@ -89,11 +89,11 @@
     "floatType": {
       "type": "object",
       "properties": {
-        "flag_type": {
+        "flagType": {
           "type": "string",
           "enum": ["float"]
         },
-        "default_value": {
+        "defaultValue": {
           "type": "number"
         },
         "description": {
@@ -105,11 +105,11 @@
     "objectType": {
       "type": "object",
       "properties": {
-        "flag_type": {
+        "flagType": {
           "type": "string",
           "enum": ["object"]
         },
-        "default_value": {
+        "defaultValue": {
           "type": "object"
         },
         "description": {

src/input.json

@@ -63,14 +63,14 @@ func unmarshalFlagManifest(data []byte, supportedFlagTypes map[generator.FlagTyp
 	}
 	for flagKey, iFlagData := range flags {
 		flagData := iFlagData.(map[string]interface{})
-		flagTypeString := flagData["flag_type"].(string)
+		flagTypeString := flagData["flagType"].(string)
 		flagType := stringToFlagType[flagTypeString]
 		if !supportedFlagTypes[flagType] {
 			log.Printf("Skipping generation of flag %q as type %v is not supported for this language", flagKey, flagTypeString)
 			continue
 		}
 		docs := flagData["description"].(string)
-		defaultValue := getDefaultValue(flagData["default_value"], flagType)
+		defaultValue := getDefaultValue(flagData["defaultValue"], flagType)
 		btData.Flags = append(btData.Flags, &generator.FlagTmplData{
 			Name:         flagKey,
 			Type:         flagType,