Implement chat and markdown views, enhance status bar, and add workflow panel

- Added `chat.rs` for rendering chat messages with timestamps and roles.
- Introduced `markdown.rs` for rendering markdown content with styling.
- Created `status.rs` to display the application status bar with session and message counts.
- Developed `workflow.rs` to show the current workflow status, including tool calls and active jobs.
- Established a `theme.rs` for centralized color management across the UI.
- Updated `mod.rs` to include new modules and manage rendering logic.

src/resources.rs

@@ -0,0 +1,46 @@
+pub const BANNER: &str = r"
+███████╗███████╗███████╗██████╗ ███████╗██╗  ██╗
+╚══███╔╝██╔════╝██╔════╝██╔══██╗██╔════╝╚██╗██╔╝
+  ███╔╝ █████╗  ███████╗██║  ██║█████╗   ╚███╔╝
+ ███╔╝  ██╔══╝  ╚════██║██║  ██║██╔══╝   ██╔██╗
+███████╗███████╗███████║██████╔╝███████╗██╔╝ ██╗
+╚══════╝╚══════╝╚══════╝╚═════╝ ╚══════╝╚═╝  ╚═╝
+          Autonomous Agentic Shell
+";
+
+pub const HELP_TEXT: &str = "
+ZESDEX - Help
+=============
+Navigation:
+  Ctrl+Q       Quit
+  Ctrl+H       Help (this screen)
+  Ctrl+P       Settings
+  Ctrl+A       Cycle agent mode (Auto/Normal/Plan/Yolo)
+  Ctrl+B       Bash panel
+  Ctrl+S       Session hub
+  Ctrl+T       Task list
+  Ctrl+W       Workflow view
+  Ctrl+K       Key input mode
+  Esc          Cancel / back
+  Tab          Autocomplete
+  Up/Down      History navigation
+
+Modes:
+  Auto         Automatic approval of most operations
+  Normal       Manual approval for risky operations
+  Plan         Planning mode - no code changes
+  Yolo         Unrestricted - full autonomy
+
+Input:
+  /help        Show help
+  /clear       Clear screen
+  /mode        Show current mode
+  /exit        Exit application
+  /settings    Open settings
+  /session     Session management
+
+Commands:
+  Any text is sent to the AI assistant as a prompt.
+  File paths use workspace-relative notation.
+  Use [0]/path for multi-workspace setups.
+";