feat(target_chains/ton): initialize ton contracts (#1810)

* initialize ton contracts

* precommit

target_chains/ton/contracts/README.md

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+# pyth
+
+## Project structure
+
+- `contracts` - source code of all the smart contracts of the project and their dependencies.
+- `wrappers` - wrapper classes (implementing `Contract` from ton-core) for the contracts, including any [de]serialization primitives and compilation functions.
+- `tests` - tests for the contracts.
+- `scripts` - scripts used by the project, mainly the deployment scripts.
+
+## How to use
+
+### Build
+
+`npx blueprint build` or `yarn blueprint build`
+
+### Test
+
+`npx blueprint test` or `yarn blueprint test`
+
+### Deploy or run another script
+
+`npx blueprint run` or `yarn blueprint run`
+
+### Add a new contract
+
+`npx blueprint create ContractName` or `yarn blueprint create ContractName`

target_chains/ton/contracts/contracts/pyth.fc

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+#include "imports/stdlib.fc";
+
+() recv_internal(int my_balance, int msg_value, cell in_msg_full, slice in_msg_body) impure {
+
+}

target_chains/ton/contracts/jest.config.ts

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+import type { Config } from "jest";
+
+const config: Config = {
+  preset: "ts-jest",
+  testEnvironment: "node",
+  testPathIgnorePatterns: ["/node_modules/", "/dist/"],
+};
+
+export default config;