feat(docs): complete PlayHours mod implementation with comprehensive documentation

- Add complete PlayHours mod source code with all features:
  * Schedule enforcement with per-day schedules and midnight-spanning support
  * Login control with configurable thresholds and exemptions
  * Warnings and auto-kick system with countdown functionality
  * Force modes (NORMAL/FORCE_OPEN/FORCE_CLOSED) for maintenance
  * Whitelist/blacklist system for player access control
  * Date exceptions for holidays and special events
  * Multi-language support (English/French) with smart time formatting
  * LuckPerms integration with vanilla ops fallback
  * Dynamic MOTD system with real-time schedule display
  * Comprehensive command system with permission integration
  * TOML configuration with hot-reload support

- Add comprehensive documentation suite:
  * Installation guide with step-by-step setup instructions
  * Complete configuration reference with all options
  * Commands reference with usage examples
  * Features overview with detailed explanations
  * MOTD system configuration and customization guide
  * Permissions system documentation with LuckPerms integration
  * Technical details covering architecture and limitations
  * Usage examples with real-world scenarios
  * Changelog with version history

- Add resource files:
  * Language files (en_us.json, fr_fr.json) with localized messages
  * Mod metadata (mods.toml) with proper Forge configuration
  * Resource pack metadata (pack.mcmeta)

- Update build configuration:
  * Gradle build system with proper dependencies
  * Project properties and version management
  * Development environment setup

- Restructure documentation:
  * Replace old README.txt with new comprehensive README.md
  * Create modular documentation structure in docs/ directory
  * Add cross-references and navigation between documents
  * Include quick start guide and common use cases

This commit represents the complete v1.0.0 release of PlayHours, a production-ready server operation hours enforcement mod for Minecraft Forge 1.20.1.

src/main/resources/META-INF/mods.toml

@@ -8,7 +8,6 @@ modLoader="javafml" #mandatory
 # A version range to match for said mod loader - for regular FML @Mod it will be the forge version
 loaderVersion="${loader_version_range}" #mandatory This is typically bumped every Minecraft version by Forge. See our download page for lists of versions.
 # The license for you mod. This is mandatory metadata and allows for easier comprehension of your redistributive properties.
-# Review your options at https://choosealicense.com/. All rights reserved is the default copyright stance, and is thus the default here.
 license="${mod_license}"
 # A URL to refer people to when problems occur with this mod
 #issueTrackerURL="https://change.me.to.your.issue.tracker.example.invalid/" #optional
@@ -26,20 +25,16 @@ displayName="${mod_name}" #mandatory
 # A URL to query for updates for this mod. See the JSON update specification https://docs.minecraftforge.net/en/latest/misc/updatechecker/
 #updateJSONURL="https://change.me.example.invalid/updates.json" #optional
 # A URL for the "homepage" for this mod, displayed in the mod UI
-#displayURL="https://change.me.to.your.mods.homepage.example.invalid/" #optional
+#displayURL="https://example.invalid/" #optional
 # A file name (in the root of the mod JAR) containing a logo for display
-#logoFile="examplemod.png" #optional
+#logoFile="playhours.png" #optional
 # A text field displayed in the mod UI
 #credits="" #optional
 # A text field displayed in the mod UI
 authors="${mod_authors}" #optional
 # Display Test controls the display for your mod in the server connection screen
-# MATCH_VERSION means that your mod will cause a red X if the versions on client and server differ. This is the default behaviour and should be what you choose if you have server and client elements to your mod.
-# IGNORE_SERVER_VERSION means that your mod will not cause a red X if it's present on the server but not on the client. This is what you should use if you're a server only mod.
-# IGNORE_ALL_VERSION means that your mod will not cause a red X if it's present on the client or the server. This is a special case and should only be used if your mod has no server component.
-# NONE means that no display test is set on your mod. You need to do this yourself, see IExtensionPoint.DisplayTest for more information. You can define any scheme you wish with this value.
-# IMPORTANT NOTE: this is NOT an instruction as to which environments (CLIENT or DEDICATED SERVER) your mod loads on. Your mod should load (and maybe do nothing!) whereever it finds itself.
-#displayTest="MATCH_VERSION" # if nothing is specified, MATCH_VERSION is the default when clientSideOnly=false, otherwise IGNORE_ALL_VERSION when clientSideOnly=true (#optional)
+# For server-only mods, IGNORE_SERVER_VERSION avoids red X when client lacks the mod
+displayTest="IGNORE_SERVER_VERSION"
 
 # The description text for the mod (multi line!) (#mandatory)
 description='''${mod_description}'''
@@ -56,7 +51,7 @@ description='''${mod_description}'''
     # AFTER - This mod is loaded AFTER the dependency
     ordering="NONE"
     # Side this dependency is applied on - BOTH, CLIENT, or SERVER
-    side="BOTH"
+side="BOTH"
 # Here's another dependency
 [[dependencies.${mod_id}]]
     modId="minecraft"
@@ -64,7 +59,7 @@ description='''${mod_description}'''
     # This version range declares a minimum of the current minecraft version up to but not including the next major version
     versionRange="${minecraft_version_range}"
     ordering="NONE"
-    side="BOTH"
+side="BOTH"
 
 # Features are specific properties of the game environment, that you may want to declare you require. This example declares
 # that your mod requires GL version 3.2 or higher. Other features will be added. They are side aware so declaring this won't