BUGFIX: Editor loads scripts at wrong time

[catloversg]

Test scripts:
test.ts

import { multiply } from "./lib";

export async function main(ns: NS) {
  ns.print(`multiply: ${multiply(2, 3)}`);
}

lib.ts

export const multiply = (a: number, b: number) => a * b;

How to reproduce this bug:

• Load a clean save file.
• Save test scripts. Reload the page.
• nano test.ts.
• Switch to the terminal tab, then switch back to the editor tab.

loadAllServerScripts is called in parseCode. There are 2 problems:

• loadAllServerScripts is called every time the player edits their code. This means that it's called after every keystroke.
• Even in this case, calling it in parseCode is still too late. It needs to be called much earlier. The start of onMount is a proper place. I also call it in onTabClick. It may be useful if something else (via NS APIs or RFA) changes (add/edit/delete) scripts. For example, if an external editor pushes a script via RFA, we will load that new script when the player switches tabs. Technically, doing that in debouncedCodeParsing may be better, but I think it's overkill.

[catloversg]

Superseded by #1893.