✨ feat: Agent Panel UI Enhancements (#7800)

* feat: add MCP Panel to Agent Builder

- Add MCP server panel and configuration UI
- Implement MCP input forms and tool lists
- Add MCP icon and metadata support
- Integrate MCP with agent configuration
- Add localization support for MCP features
- Refactor components for better reusability
- Update types and add MCP-related mutations
- Fix small issues with Actions and AgentSelect
- Refactor AgentPanelSwitch and related components to use new
  AgentPanelContext to reduce prop drilling

* chore: import order

* chore: clean up import statements and unused var in ActionsPanel component

* refactor: AgentPanelContext with actions query, remove unnecessary `actions` state

- Added actions query using `useGetActionsQuery` to fetch actions based on the current agent ID.
- Removed now unused `setActions` state and related logic from `AgentPanelContext` and `AgentPanelSwitch` components.
- Updated `AgentPanelContextType` to reflect the removal of `setActions`.

* chore: re-order import statements in AgentConfig component

* chore: re-order import statements in ModelPanel component

* chore: update ModelPanel props to consolidated props to avoid passing unnecessary props

* chore: update import statements in Providers index file to include ToastProvider and AgentPanelContext exports

* chore: clean up import statements in VersionPanel component

* refactor: streamline AgentConfig and AgentPanel components

- Consolidated props in AgentConfig to only include necessary fields.
- Updated AgentPanel to remove unused state and props, enhancing clarity and maintainability.
- Reorganized import statements for better structure and readability.

* refactor: replace default agent form values with utility function

- Updated AgentsProvider, AgentPanel, AgentSelect, and DeleteButton components to use getDefaultAgentFormValues utility function instead of directly importing defaultAgentFormValues.
- Enhanced the initialization of agent forms by incorporating localStorage values for model and provider in the new utility function.

* chore: comment out rendering MCPSection

---------

Co-authored-by: Dustin Healy <54083382+dustinhealy@users.noreply.github.com>

client/src/components/SidePanel/Agents/DeleteButton.tsx

@@ -1,12 +1,11 @@
 import { useFormContext } from 'react-hook-form';
-import { defaultAgentFormValues } from 'librechat-data-provider';
 import type { Agent, AgentCreateParams } from 'librechat-data-provider';
 import type { UseMutationResult } from '@tanstack/react-query';
+import { cn, logger, removeFocusOutlines, getDefaultAgentFormValues } from '~/utils';
 import { OGDialog, OGDialogTrigger, Label } from '~/components/ui';
-import { useChatContext, useToastContext } from '~/Providers';
 import OGDialogTemplate from '~/components/ui/OGDialogTemplate';
+import { useChatContext, useToastContext } from '~/Providers';
 import { useLocalize, useSetIndexOptions } from '~/hooks';
-import { cn, removeFocusOutlines, logger } from '~/utils';
 import { useDeleteAgentMutation } from '~/data-provider';
 import { TrashIcon } from '~/components/svg';
 
@@ -45,9 +44,7 @@ export default function DeleteButton({
       const firstAgent = updatedList[0] as Agent | undefined;
       if (!firstAgent) {
         setCurrentAgentId(undefined);
-        reset({
-          ...defaultAgentFormValues,
-        });
+        reset(getDefaultAgentFormValues());
         return setOption('agent_id')('');
       }