add solang milestone 2

Signed-off-by: salaheldinsoliman <[email protected]>

deliveries/Solang-developer-experience-improvements-2.md

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+# Milestone Delivery :mailbox:
+
+
+**The [invoice form :pencil:](https://docs.google.com/forms/d/e/1FAIpQLSfmNYaoCgrxyhzgoKQ0ynQvnNRoTmgApz9NrMp-hd8mhIiO0A/viewform) has been filled out correctly for this milestone and the delivery is according to the official [milestone delivery guidelines](https://github.com/w3f/Grants-Program/blob/master/docs/Support%20Docs/milestone-deliverables-guidelines.md).**  
+
+* **Application Document:** https://github.com/w3f/Grants-Program/blob/master/applications/Solang_developer_experience_improvements.md
+* **Milestone Number:** 2
+
+**Context** 
+This milestone improves Solidity development experience on Substrate based chains, by providing a way to read compiler configurations from a `solang.toml` file, as well as providing a command `solang new` responsible for creating a solang project directory with an example contract as well as an example configuration file.
+
+
+**Deliverables**
+
+
+| Number | Deliverable | Link | Notes |
+| ------------- | ------------- | ------------- |------------- |
+| 0a. | License | https://github.com/hyperledger/solang/blob/main/LICENSE | Apache-2.0 |
+| 0b. | Documentation | https://solang.readthedocs.io/en/latest/running.html#compiler-usage https://solang.readthedocs.io/en/latest/running.html#starting-a-new-project| In Solang's documentation, one can find the flags `contract-authors`, `version` and `config-file`.  `solang new` can be found at the second link.|
+| 0c. | Testing |https://github.com/hyperledger/solang/blob/main/src/bin/cli/test.rs https://github.com/hyperledger/solang/blob/main/tests/cli.rs| The provided tests cover the newly added functionalities: `solang new` as well as unit tests for reading the configurations from `solang.toml` |
+| **0d.** | Docker | There will be no independent DockerFiler for this milestone, because Solang has its own DockerFile, which can be used to test the mentioned functionalities.|
+|     0e. | Article |https://forum.polkadot.network/t/introducing-solang-improvements/3361 |
+|      1. | Implement [Solang projects](https://github.com/hyperledger/solang/milestone/6) | https://github.com/hyperledger/solang/pull/1316 https://github.com/hyperledger/solang/pull/1347 https://github.com/hyperledger/solang/pull/1392 | Regarding the substrate target configuration, I added a comment on the milestone describing why it should be left as is. I took a week of researching this issue, then spoke with the maintainers and agreed that this was the best option for the users. |
+
+
+**Repositories** 
+(Apache-2.0)
+| Component | Repo | Language |
+| -----: | ----------- | ------- |
+| All components | https://github.com/hyperledger/solang | Rust/Solidity |