## Description

closes #6861 

`forc` was allowing dependency name being the same (through the use of
`package` alias and the declaration itself) as the project name.

The following two cases are now invalid and produces an error on the
forc-pkg side before going to the compiler.

```TOML
[project]
authors = ["Fuel Labs <[email protected]>"]
entry = "main.sw"
license = "Apache-2.0"
name = "lib_contract"

[dependencies]
lib_contract = { path = "../lib_contract_abi/", package = "lib_contract_abi" }
```


and

```TOML
[project]
authors = ["Fuel Labs <[email protected]>"]
entry = "main.sw"
license = "Apache-2.0"
name = "lib_contract_abi"

[dependencies]
lib_contract = { path = "../lib_contract_abi/", package = "lib_contract_abi" }

```

---------

Co-authored-by: Joshua Batty <[email protected]>