Rework resolver (#489)

* Rework IR and resolver to use nested lookup tables
* Integrate types into IR
* Make components prefer IR, slimmed down AST
* Implement `export *`
* Add `@lazy` annotation and remove `--noTreeShaking`
* Add `@start` annotation and remove magic `main`
* Related refactoring, cleanup and docs

std/assembly/index.d.ts

@@ -38,8 +38,6 @@ declare type f64 = number;
 
 /** Compiler target. 0 = JS, 1 = WASM32, 2 = WASM64. */
 declare const ASC_TARGET: i32;
-/** Provided noTreeshaking option. */
-declare const ASC_NO_TREESHAKING: bool;
 /** Provided noAssert option. */
 declare const ASC_NO_ASSERT: bool;
 /** Provided memoryBase option. */
@@ -354,7 +352,7 @@ declare namespace f64 {
   export function store(offset: usize, value: f64, constantOffset?: usize): void;
 }
 /** Macro type evaluating to the underlying native WebAssembly type. */
-declare type NATIVE<T> = T;
+declare type native<T> = T;
 
 /** Pseudo-class representing the backing class of integer types. */
 declare class _Integer {
@@ -966,7 +964,7 @@ declare function unmanaged(constructor: Function): void;
 /** Annotates a class as being sealed / non-derivable. */
 declare function sealed(constructor: Function): void;
 
-/** Annotates a method or function as always inlined. */
+/** Annotates a method, function or constant global as always inlined. */
 declare function inline(
   target: any,
   propertyKey: string,
@@ -979,3 +977,17 @@ declare function external(namespace: string, name: string): (
   propertyKey: string,
   descriptor: TypedPropertyDescriptor<any>
 ) => TypedPropertyDescriptor<any> | void;
+
+/** Annotates a global for lazy compilation. */
+declare function lazy(
+  target: any,
+  propertyKey: string,
+  descriptor: TypedPropertyDescriptor<any>
+): TypedPropertyDescriptor<any> | void;
+
+/** Annotates a function as the explicit start function. */
+declare function start(
+  target: any,
+  propertyKey: string,
+  descriptor: TypedPropertyDescriptor<any>
+): TypedPropertyDescriptor<any> | void;