Refactor type dag

[taichi-ishitani]

To fix #1131 and #1070, we need to create tag table after resolving references.
For this purpose dependencies property is added to Symbol.
This contains typed entries below which are refered from the entry.

• Module
• Interface
• Modport
• Package
• Enum
• Typedef
• Struct
• Unit
• Function

veryl/crates/analyzer/src/symbol.rs

Line 69 in 69da726

pub dependencies: Vec<SymbolId>,

dependencies are collected duaring resolving reference by create_referecne.

veryl/crates/analyzer/src/handlers/create_reference.rs

Line 104 in 69da726

self.add_dependency_to_parent_scope(&symbol.found);

veryl/crates/analyzer/src/handlers/create_reference.rs

Line 130 in 69da726

add_dependency(&symbol.found, &arg_symbol.found);

Following dependencies example is for Veryl code below.

package foo_pkg {
  enum Foo {
    foo_member
  }
}

package bar_pkg {
  struct Bar {
    bar: foo_pkg::Foo
  }
}

package baz_pkg {
  enum Baz {
    baz_member
  }
}

module qux {
  var bar: bar_pkg::Bar;
  var baz: baz_pkg::Baz;
}

qux
+-- bar_pkg::Bar
|   `-- foo_pkg::foo
`-- baz_pkg::Baz

After collecting dependencies, type tag will be created by interating dependencies and their parent symbols.

veryl/crates/analyzer/src/analyzer/create_type_dag.rs

Line 30 in 69da726

self.add_type_dag(symbol);

fix #1131
fix #1070

[taichi-ishitani]

#1147 is more simple way so this PR is clonsed.