docs: added theme documentation (#17)

Author: haato3o

src/_posts/2026-02-17-development-tools.md

@@ -0,0 +1,55 @@
+---
+layout: post
+title: "Development Tools"
+date: 2026-02-17 11:49 -0300
+badge: docs
+categories: [Documentation, Customization]
+---
+
+HunterPie includes development tools that help with development, debugging, and testing. These tools are hidden by default but can be enabled through feature flags.
+
+## Enabling Development Tools
+
+To access HunterPie's development features, you'll need to enable them through the feature flags system:
+
+### Step 1: Enable Development Feature Flags
+
+1. Open HunterPie Settings
+2. Click on "Client" settings
+3. Scroll all the way down to the bottom of the settings page
+4. Enable **"Enable development feature flags"**
+
+### Step 2: Reload Settings
+
+1. **Exit** the settings page completely
+2. **Re-enter** the settings page to reload all options
+
+> This step is crucial as it refreshes the settings interface to show newly available options.
+{: .prompt-info }
+
+### Step 3: Access Feature Flags
+
+1. In the settings page, scroll down on the sidebar
+2. At the very bottom, you'll now see a **"Feature Flags"** option
+3. Click on **"Feature Flags"**
+
+### Step 4: Enable Advanced Development Features
+
+1. In the Feature Flags section, find **"feature_enable_advanced_dev"**
+2. **Enable** this feature flag
+
+### Step 5: Restart HunterPie
+
+1. Restart HunterPie by pressing <kbd>Ctrl</kbd>+<kbd>R</kbd>
+
+After following these steps, you'll have access to HunterPie's full development options, including:
+
+- **Mock Widgets** - Test themes with fake data without running the game
+- **Overlay Manager** - Controls design mode, position and settings of the mocked widgets 
+
+## Development Features
+
+Once development tools are enabled, you can access various debugging and testing features that make theme development and troubleshooting much easier.
+
+> **Important**: Some development features may impact performance and are intended for development use only. Disable them for normal gameplay.
+{: .prompt-warning }