docs: update to v0.2.0, add install instructions and gain command

Author: pszymkowiak

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rtk"
-version = "0.1.9"
+version = "0.2.0"
 edition = "2021"
 authors = ["Patrick Szymkowiak"]
 description = "Rust Token Killer - High-performance CLI proxy to minimize LLM token consumption"

README.md

@@ -40,22 +40,30 @@ With rtk: **~45,000 tokens** → **70% reduction**
 
 ## Installation
 
-### Homebrew (macOS)
+### Quick Install (Linux/macOS)
 ```bash
-brew tap pszymkowiak/rtk
-brew install rtk
+curl -fsSL https://raw.githubusercontent.com/pszymkowiak/rtk/main/install.sh | sh
 ```
 
-### Script (Linux/macOS)
+### Homebrew (macOS)
 ```bash
-curl -fsSL https://raw.githubusercontent.com/pszymkowiak/rtk/main/install.sh | sh
+brew tap pszymkowiak/rtk
+brew install rtk
 ```
 
 ### Cargo
 ```bash
 cargo install rtk
 ```
 
+### Manual Download
+Download binaries from [Releases](https://github.com/pszymkowiak/rtk/releases):
+- macOS: `rtk-x86_64-apple-darwin.tar.gz` / `rtk-aarch64-apple-darwin.tar.gz`
+- Linux: `rtk-x86_64-unknown-linux-gnu.tar.gz` / `rtk-aarch64-unknown-linux-gnu.tar.gz`
+- Windows: `rtk-x86_64-pc-windows-msvc.zip`
+- Debian/Ubuntu: `rtk_*.deb`
+- Fedora/RHEL: `rtk-*.rpm`
+
 ## Quick Start
 
 ```bash
@@ -100,6 +108,9 @@ rtk log app.log                 # Deduplicated logs
 rtk json config.json            # Structure without values
 rtk deps                        # Dependencies summary
 rtk env -f AWS                  # Filtered env vars
+rtk gain                        # Token savings stats
+rtk gain --graph                # With ASCII graph
+rtk gain --history              # With command history
 ```
 
 ### Containers