feat: add support for codeOf T feature

[i582]

• feat: support codeOf T expression tree-sitter-tact#50
• feat(all): initial support for codeOf tact-language-server#356
• feat: add codeOf support tact-sublime#31

Benchmark

codeOf Foo vs initOf Foo().code:

Issue

Closes #1216.

Checklist

• I have updated CHANGELOG.md
• I have documented my contribution in docs/ and made the build locally
• I have added tests to demonstrate the contribution is correctly implemented: this usually includes both positive and negative tests, showing the happy path(s) and featuring intentionally broken cases
• I have run all the tests locally and no test failure was reported
• I have run the linter, formatter and spellchecker
• I did not do unrelated and/or undiscussed refactorings

[anton-trunov]

Let's also refactor the Jetton contracts to use codeOf:

...
// Owner may be any address, what matters here is the code, not data.
jettonWalletCode: initOf JettonWallet(myAddress(), myAddress()).code
...

[anton-trunov]

Awesome stuff! Can you take a stub at documenting codeOf in the Tact docs please? It would be nice to mention the "algebraic laws" there (the relationships between initOf, myCode and codeOf)

[i582]

(outdated)

[novusnota]

doc good rest ok

P.S.: The grammar was intentionally butchered for meme purposes. Thank you for your attention.

[Shvandre]

I'd also try to reuse tests I've written for InitOf, so they would use codeOf.

(Or added more)
I mean the tests with diamond-shaped contract dependencies, and cyclic dependencies

[anton-trunov]

Gas usage has just become higher for some reason