Store 'mint-packages' in one global directory

[s0kil]

Mint downloads mint-packages per project folder.
It should store in a global directory such as:

$HOME/.mint/0.2.1/package/mint-lang/mint-core/0.2.0

[s0kil]

We could pursue a path similar to https://pnpm.js.org and create a symbolic link from global/package/name to project/package/name.

[gdotdesign]

Since we are using Git repositories as packages and don't know if it makes sense to store versions of them separately, I need to think about how and if this can be implemented.

[s0kil]

We could also read from ENV variable MINT_PACKAGES_PATH, and tools such as asdf could create separate package's directory for every Mint version.

Example: Mint 0.10.0

• CLI Path: .asdf/installs/mint/0.10.0/bin/mint
• Packages Path: .asdf/installs/mint/0.10.0/.mint/packages due to MINT_PACKAGES_PATH being set to .asdf/installs/mint/0.10.0/