Refactor codebase, introduce relaymode package, update constants and improve consistency

- Refactor constant definitions and organization
- Clean up package level variables and functions
- Introduce new `relaymode` and `apitype` packages for constant definitions
- Refactor and simplify code in several packages including `openai`, `relay/channel/baidu`, `relay/util`, `relay/controller`, `relay/channeltype`
- Add helper functions in `relay/channeltype` package to convert channel type constants to corresponding API type constants
- Remove deprecated functions such as `ResponseText2Usage` from `relay/channel/openai/helper.go`
- Modify code in `relay/util/validation.go` and related files to use new `validator.ValidateTextRequest` function
- Rename `util` package to `relaymode` and update related imports in several packages

web/berry/src/views/Channel/component/EditModal.js

@@ -340,7 +340,9 @@ const EditModal = ({ open, channelId, onCancel, onOk }) => {
                     },
                   }}
                 >
-                  {Object.values(CHANNEL_OPTIONS).map((option) => {
+                  {Object.values(CHANNEL_OPTIONS).sort((a, b) => {
+                    return a.text.localeCompare(b.text)
+                  }).map((option) => {
                     return (
                       <MenuItem key={option.value} value={option.value}>
                         {option.text}

web/berry/src/views/Token/component/EditModal.js

@@ -103,7 +103,7 @@ const EditModal = ({ open, tokenId, onCancel, onOk }) => {
           fontSize: "1.125rem",
         }}
       >
-        {tokenId ? "编辑Token" : "新建Token"}
+        {tokenId ? "编辑令牌" : "新建令牌"}
       </DialogTitle>
       <Divider />
       <DialogContent>