New design for code generation and contract typing/kinding

Motivation and Context

Make code generation easier after type-checking (entry ; dyn_entry) see #2008 (closed)

Description

New:

• Ast_core.E_contract (contract_of)
• Ast_core.T_contract_parameter (Parameter constructor hack)
• Modules now have an associated sort (Ss_module or Ss_contract (parameter,storage))
• Self_ast_typed pass is now as standalone pass (i.e. is executed on all programs whether or not it is a contract, a view, or else)

Weird handling of single-entrypoint:

• compile parameter /path/to/file (with no -e) will assume a single-entrypoint
• entrypoint has no associated annotation in the michelson target type

Future:

• update doc on entrypoints
• make Self_ast_aggregated a standalone pass as well (probably by lifting it to Self_ast_typed)
• Clean Test library types

closes #2008 (closed), #2020 (closed)

Component

• compiler
• website
• webide
• vscode-plugin
• debugger

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Performance improvement (non-breaking change that improves performance)
• None (change with no changelog)

Changelog

Deprecate main contracts. Single entry-point contract will now require a [@entry]/@entry annotation

Checklist:

• If a new syntax has been introduced, put a message on slack ligo-lsp
• Changes follow the existing coding style (use dune @fmt to check).
• Tests for the changes have been added (for bug fixes / feature).
• Documentation has been updated.
• Changelog description has been added (if appropriate).
• Start titles under ## Changelog section with #### (if appropriate).
• There is no image or uploaded file in changelog
• Examples in changed behaviour have been added to the changelog (for breaking change / feature).