refactor: Major SDK architecture refactoring and API consolidation

- Consolidate separate buy/sell modules into unified trading interface
- Remove protocol-specific buy/sell files (bonk, pumpfun, pumpswap)
- Add new trading constants and utility functions
- Simplify API with unified buy/sell methods supporting multiple protocols
- Enhance documentation with comprehensive examples and usage guides
- Add balance checking and token account management utilities
- Improve code organization and maintainability

Cargo.toml

@@ -2,11 +2,11 @@
 name = "sol-trade-sdk"
 version = "0.1.0"
 edition = "2021"
-authors = ["William <byteblock6@gmail.com>"]
+authors = ["William <byteblock6@gmail.com>", "sgxiang <sgxiang@gmail.com>", "wei <1415121722@qq.com>"]
 repository = "https://github.com/0xfnzero/sol-trade-sdk"
 description = "Rust SDK to interact with the dex trade Solana program."
 license = "MIT"
-keywords = ["solana", "memecoins", "pumpfun", "pumpswap", "raydium"]
+keywords = ["solana", "memecoins", "pumpfun", "pumpswap", "raydium", "bonk", "shreds", "yellowstone"]
 readme = "README.md"
 
 [lib]
@@ -65,7 +65,6 @@ lazy_static = "1.5.0"
 once_cell = "1.20.3"
 prost = "0.13.5"
 prost-types = "0.13.5"
-arrform = { git = "https://github.com/raydium-io/arrform" }
 num_enum = "0.7.3"
 num-derive = "0.4.2"
 num-traits = "0.2.19"