Update documentation and configuration for Realtime Agent Studio

- Revised mkdocs.yml to reflect the new site name and description, enhancing clarity for users.
- Added a changelog.md to document important changes and updates for the project.
- Introduced a roadmap.md to outline development plans and progress for future releases.
- Expanded index.md with a comprehensive overview of the platform, including core features and installation instructions.
- Enhanced concepts documentation with detailed explanations of assistants, engines, and their configurations.
- Updated configuration documentation to provide clear guidance on environment setup and service configurations.
- Added extra JavaScript for improved user experience in the documentation site.

docs/content/stylesheets/extra.css

@@ -0,0 +1,156 @@
+/* Realtime Agent Studio - Custom Styles */
+
+:root {
+  --md-primary-fg-color: #4f46e5;
+  --md-primary-fg-color--light: #6366f1;
+  --md-primary-fg-color--dark: #4338ca;
+  --md-accent-fg-color: #6366f1;
+}
+
+/* Hero Section - Center aligned content */
+.md-typeset p[align="center"] {
+  text-align: center;
+}
+
+.md-typeset p[align="center"] img {
+  display: inline-block;
+  margin: 0 4px;
+  vertical-align: middle;
+}
+
+.md-typeset p[align="center"] a {
+  margin: 0 8px;
+}
+
+[data-md-color-scheme="slate"] {
+  --md-primary-fg-color: #818cf8;
+  --md-primary-fg-color--light: #a5b4fc;
+  --md-primary-fg-color--dark: #6366f1;
+  --md-accent-fg-color: #818cf8;
+}
+
+/* Hero Section Styling */
+.md-content h1 {
+  font-weight: 700;
+  letter-spacing: -0.02em;
+}
+
+/* Badge Styling */
+.md-content img[src*="badge"] {
+  margin: 0 4px;
+  vertical-align: middle;
+}
+
+/* Grid Cards Enhancement */
+.md-typeset .grid.cards > ul > li {
+  border: 1px solid var(--md-default-fg-color--lightest);
+  border-radius: 8px;
+  transition: all 0.2s ease;
+}
+
+.md-typeset .grid.cards > ul > li:hover {
+  border-color: var(--md-primary-fg-color);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
+  transform: translateY(-2px);
+}
+
+/* Code Block Enhancement */
+.md-typeset pre > code {
+  border-radius: 8px;
+}
+
+.md-typeset .highlight {
+  border-radius: 8px;
+  overflow: hidden;
+}
+
+/* Table Enhancement */
+.md-typeset table:not([class]) {
+  border-radius: 8px;
+  overflow: hidden;
+  border: 1px solid var(--md-default-fg-color--lightest);
+}
+
+.md-typeset table:not([class]) th {
+  background-color: var(--md-default-fg-color--lightest);
+  font-weight: 600;
+}
+
+/* Admonition Enhancement */
+.md-typeset .admonition,
+.md-typeset details {
+  border-radius: 8px;
+  border: none;
+}
+
+/* Mermaid Diagram Styling */
+.mermaid {
+  margin: 1.5rem 0;
+}
+
+/* Navigation Enhancement */
+.md-nav__link {
+  font-weight: 500;
+}
+
+.md-nav__item--active > .md-nav__link {
+  font-weight: 600;
+}
+
+/* Footer Styling */
+.md-footer {
+  margin-top: 3rem;
+}
+
+/* Center align for hero badges */
+.md-content > .md-typeset > div[align="center"] img {
+  margin: 0.25rem;
+}
+
+/* Task list styling */
+.md-typeset .task-list-item input[type="checkbox"] {
+  margin-right: 0.5rem;
+}
+
+/* Improve readability */
+.md-typeset {
+  font-size: 0.85rem;
+  line-height: 1.75;
+}
+
+.md-typeset h2 {
+  margin-top: 2.5rem;
+  padding-bottom: 0.5rem;
+  border-bottom: 1px solid var(--md-default-fg-color--lightest);
+}
+
+.md-typeset h3 {
+  margin-top: 1.5rem;
+}
+
+/* Responsive improvements */
+@media screen and (max-width: 76.1875em) {
+  .md-typeset .grid.cards > ul > li {
+    padding: 1rem;
+  }
+}
+
+/* Animation for interactive elements */
+.md-typeset a:not(.md-button) {
+  transition: color 0.15s ease;
+}
+
+.md-typeset a:not(.md-button):hover {
+  color: var(--md-accent-fg-color);
+}
+
+/* Version selector styling */
+.md-version {
+  font-size: 0.75rem;
+}
+
+/* Search highlight */
+.md-search-result mark {
+  background-color: var(--md-accent-fg-color--transparent);
+  color: inherit;
+}