Translate Wasm component's start section with an entry function

The entry function is like a global constructor for the component. See detailed reasoning in https://github.com/0xPolygonMiden/compiler/pull/100#discussion_r1491753231

Review the linked PR discussion to understand the concept of an entry function as a global constructor for a Wasm component. Examine the compiler's Wasm component translation module, likely in a directory like `src/wasm/` or `src/translation/`. Look for existing handling of the start section. The goal is to modify the translation to incorporate this entry function logic.

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