Enhance HRIStudio with immersive experiment designer and comprehensive documentation updates

- Introduced a new immersive experiment designer using React Flow, providing a professional-grade visual flow editor for creating experiments.
- Added detailed documentation for the flow designer connections and ordering system, emphasizing its advantages and implementation details.
- Updated existing documentation to reflect the latest features and improvements, including a streamlined README and quick reference guide.
- Consolidated participant type definitions into a new file for better organization and clarity.

Features:
- Enhanced user experience with a node-based interface for experiment design.
- Comprehensive documentation supporting new features and development practices.

Breaking Changes: None - existing functionality remains intact.

src/components/experiments/ExperimentForm.tsx

@@ -2,9 +2,18 @@
 
 import { zodResolver } from "@hookform/resolvers/zod";
 import { FlaskConical } from "lucide-react";
-import { useState, useEffect } from "react";
+import { useRouter } from "next/navigation";
+import { useEffect, useState } from "react";
 import { useForm } from "react-hook-form";
 import { z } from "zod";
+import { useBreadcrumbsEffect } from "~/components/ui/breadcrumb-provider";
+import {
+  EntityForm,
+  FormField,
+  FormSection,
+  NextSteps,
+  Tips,
+} from "~/components/ui/entity-form";
 import { Input } from "~/components/ui/input";
 import { Label } from "~/components/ui/label";
 import {
@@ -15,16 +24,7 @@ import {
   SelectValue,
 } from "~/components/ui/select";
 import { Textarea } from "~/components/ui/textarea";
-import {
-  EntityForm,
-  FormField,
-  FormSection,
-  NextSteps,
-  Tips,
-} from "~/components/ui/entity-form";
-import { useBreadcrumbsEffect } from "~/components/ui/breadcrumb-provider";
 import { useStudyContext } from "~/lib/study-context";
-import { useRouter } from "next/navigation";
 import { api } from "~/trpc/react";
 
 const experimentSchema = z.object({