docs: update zellij-ps to reflect project switcher functionality

- Update package description and fix mainProgram typo
- Rewrite documentation to describe project switching, not process viewing
- Add PROJECT_FOLDERS configuration and usage examples
- Update all references across docs (README, guides, module overviews)

docs/packages/code2prompt.md

@@ -0,0 +1,206 @@
+# code2prompt
+
+A CLI tool that converts your codebase into a single LLM prompt with a source tree, prompt templating, and token counting.
+
+## Description
+
+code2prompt is a command-line tool designed to help developers prepare their codebases for analysis by Large Language Models (LLMs). It creates a comprehensive prompt that includes:
+
+- Source code tree structure
+- Concatenated file contents
+- Prompt templates
+- Token counting for context management
+
+## Features
+
+- 📁 **Source Tree Generation**: Visual representation of your codebase structure
+- 📝 **Code Concatenation**: Merges multiple files into a single prompt
+- 🧩 **Prompt Templates**: Customizable prompt templates
+- 🔢 **Token Counting**: Accurate token counting for various LLMs
+- 🎯 **Selective Inclusion**: Choose specific files and directories
+- 🔒 **Smart Filtering**: Exclude files by pattern (.git, node_modules, etc.)
+
+## Installation
+
+### Via Overlay
+
+```nix
+{pkgs, ...}: {
+  environment.systemPackages = with pkgs; [
+    code2prompt
+  ];
+}
+```
+
+### Direct Reference
+
+```nix
+{pkgs, ...}: {
+  environment.systemPackages = with pkgs; [
+    inputs.m3ta-nixpkgs.packages.${pkgs.system}.code2prompt
+  ];
+}
+```
+
+### Run Directly
+
+```bash
+nix run git+https://code.m3ta.dev/m3tam3re/nixpkgs#code2prompt
+```
+
+## Usage
+
+### Basic Usage
+
+```bash
+# Generate prompt for current directory
+code2prompt
+
+# Generate for specific directory
+code2prompt /path/to/project
+
+# Output to file
+code2prompt -o prompt.txt
+
+# Use custom template
+code2prompt --template my_template.md
+```
+
+### Common Options
+
+```bash
+# Include specific files
+code2prompt --include "*.py" "*.js"
+
+# Exclude specific files
+code2prompt --exclude "*.test.*" "node_modules/*"
+
+# Generate source tree only
+code2prompt --tree-only
+
+# Add custom context
+code2prompt --context "This is a Node.js project"
+```
+
+### Examples
+
+#### Prepare Codebase for GPT-4
+
+```bash
+code2prompt \
+  --template gpt4-template.md \
+  --include "*.ts" "*.tsx" \
+  --exclude "node_modules" "*.test.ts" \
+  --context "Review this TypeScript codebase" \
+  -o codebase_prompt.txt
+
+# Then feed to GPT-4
+cat codebase_prompt.txt
+```
+
+#### Analyze Specific Directory
+
+```bash
+# Analyze only src directory
+code2prompt src/ \
+  --include "*.rs" \
+  --context "Analyze this Rust codebase" \
+  -o src_analysis.txt
+```
+
+#### Create Source Tree
+
+```bash
+# Generate only source tree
+code2prompt --tree-only > tree.txt
+
+cat tree.txt
+```
+
+## Use Cases
+
+### Code Review
+
+Prepare code for AI-assisted code review:
+
+```bash
+code2prompt \
+  --template code-review.md \
+  --include "*.py" \
+  --context "Review this Python code for security issues" \
+  -o review_prompt.txt
+```
+
+### Documentation Generation
+
+Generate documentation using LLMs:
+
+```bash
+code2prompt \
+  --template docs-template.md \
+  --include "*.js" "*.md" \
+  --context "Generate API documentation" \
+  -o docs_prompt.txt
+```
+
+### Code Migration
+
+Prepare code for migration assistance:
+
+```bash
+code2prompt \
+  --template migration-template.md \
+  --include "*.js" \
+  --context "Migrate this JavaScript to TypeScript" \
+  -o migration_prompt.txt
+```
+
+## Configuration
+
+### Environment Variables
+
+- `CODE2PROMPT_TEMPLATE_DIR`: Directory containing custom templates
+- `CODE2PROMPT_DEFAULT_TEMPLATE`: Default template to use
+
+### Template Files
+
+Custom templates can include:
+
+```markdown
+# Codebase Analysis
+
+## Context
+{context}
+
+## Directory Tree
+{tree}
+
+## Code
+{code}
+
+## Instructions
+{instructions}
+```
+
+## Build Information
+
+- **Version**: 4.0.2
+- **Language**: Rust
+- **License**: MIT
+- **Source**: [GitHub](https://github.com/mufeedvh/code2prompt)
+
+## Dependencies
+
+- `openssl` - Secure communication
+- `pkg-config` - Build configuration
+
+## Platform Support
+
+- Linux (primary)
+- macOS (may work)
+- Windows (not tested)
+
+## Related
+
+- [Adding Packages](../guides/adding-packages.md) - How to add new packages
+- [Quick Start](../QUICKSTART.md) - Getting started guide