[solana] Start to implement the solana receiver contract (#557)

* Start to implement the solana receiver contract

* Use "cargo run" instead of the compiled binary under target/debug

* Update cargo dependency

* Add "pyth-" prefix to crate names

* Remove the transfer step in cli which is only necessary for pythnet, not solana

Author: yhzhang0128

target_chains/solana/.gitignore

@@ -0,0 +1,7 @@
+
+.anchor
+.DS_Store
+target
+**/*.rs.bk
+node_modules
+test-ledger

target_chains/solana/.prettierignore

@@ -0,0 +1,8 @@
+
+.anchor
+.DS_Store
+target
+node_modules
+dist
+build
+test-ledger

target_chains/solana/Anchor.toml

@@ -0,0 +1,15 @@
+[features]
+seeds = false
+skip-lint = false
+[programs.localnet]
+solana_receiver = "Fg6PaFpoGXkYsidMpWTK6W2BeZ7FEfcYkg476zPFsLnS"
+
+[registry]
+url = "https://api.apr.dev"
+
+[provider]
+cluster = "Localnet"
+wallet = "/home/yunhao/.config/solana/id.json"
+
+[scripts]
+test = "yarn run ts-mocha -p ./tsconfig.json -t 1000000 tests/**/*.ts"