Markdown engine / Image rendering

[ploMP4]

This pull request adds image rendering along with a refactor to the markdown parsing engine.

Markdown Architecture

Parser:

• An extensible parser architecture with multiple specialized parsers
• Each parser uses a Trigger() method to identify the specific byte that activates its parsing logic
• Supports parser prioritization to handle cases where multiple parsers share the same trigger byte
• Implements graceful fallback: parsers return nil on failure, allowing the system to try the next parser in priority order
• Creates GlamourNode instances when no specialized parser can handle the content

Renderer:

The Renderer consumes the nodes generated by the parser and generates the proper output

graph TB
    subgraph "Markdown Package Architecture"
        A[Input Markdown Text] --> B[MarkdownParser]
        
        subgraph "Parser Registry"
            C[Parser A<br/>Priority: 1]
            D[Parser B<br/>Priority: 2]
            E[Parser N<br/>Priority: N]
        end
        
        B --> F[Trigger-Based Parser Selection]
        C --> F
        D --> F
        E --> F
        
        subgraph "Node Types"
            G[Custom Node A]
            H[Custom Node B]
            I[GlamourNode<br/>Fallback]
        end
        
        F --> G
        F --> H
        F --> I
        
        subgraph "Renderer Components"
            J[Main Renderer]
            K[Default Renderer For GlamourNode]
            L[Custom Renderer For Node A]
            M[Custom Renderer For Node B]
        end
        
        G --> J
        H --> J
        I --> J
        
        J --> K
        J --> L
        J --> M
        
        N[Styled Terminal Output] 
        K --> N
        L --> N
        M --> N
    end

Loading

[tharropoulos]

Please add an example presentation so we have a common ground for what we are rendering

[tharropoulos]

Tiny little changes 😅