FormattedTextHelper: stricter URL parsing

[tal5]

Reported on Discord.

TL;DR Adventure more strictly verifies URLs now which revealed some issues where the parser would end up including invalid characters in the embedded URL.

Can be solved by simply adding more characters to the indexOfAny check, but I decided to try a different approach and use a whitelist of valid characters to find the first non-url-valid character and end the theoretical URL there.
I also added an additional length check after the exact URL end index is found, just as a quick exit in some edge cases.

This also adds a new URI(url) test in a try/catch, as a final verification before adding the URL click event to the component.

Quick test of the logic:

public static void test(String test) {
    int urlEnd = findUrlEndIndex(test.toCharArray(), 0);
    String trimmed = test.substring(0, urlEnd);
    boolean parsed;
    try {
        new URI(trimmed);
        parsed = true;
    }
    catch (URISyntaxException ignored) {
        parsed = false;
    }
    System.out.println("Test URL Parse '" + test + "' End Index '" + urlEnd + "' Final String '" + trimmed + "' " + (parsed ? "Parsed" : "DID NOT PARSE"));
}

static {
    test("https://www.blob.com");
    test("https://www.blob.com{]");
    test("https://www.blob.com\"");
    test("https://www.world.tv?param=_&info=13");
    test("https://www.world.tv?param=_&info=13]");
    test("https://www.world.tv?param=_&info=13\"][");
    test("https://www.blob.com/?numbers=%5B1%2C2%2C3%5D&info=%22name%22");
    test("https://www.blob.com/?numbers=%5B1%2C2%2C3%5D&info=%22name%22\"ge");
    test("https://www.blob.com/?numbers=%5B1%2C2%2C3%5D&info=%2Qname%22");
    test("://www.blob.com/?numbers=%5B1%2C2%2C3%5D&info=%2Qname%22");
}

Results in:

Test URL Parse 'https://www.blob.com' End Index '20' Final String 'https://www.blob.com' Parsed
Test URL Parse 'https://www.blob.com{]' End Index '20' Final String 'https://www.blob.com' Parsed
Test URL Parse 'https://www.blob.com"' End Index '20' Final String 'https://www.blob.com' Parsed
Test URL Parse 'https://www.world.tv?param=_&info=13' End Index '36' Final String 'https://www.world.tv?param=_&info=13' Parsed
Test URL Parse 'https://www.world.tv?param=_&info=13]' End Index '36' Final String 'https://www.world.tv?param=_&info=13' Parsed
Test URL Parse 'https://www.world.tv?param=_&info=13"][' End Index '36' Final String 'https://www.world.tv?param=_&info=13' Parsed
Test URL Parse 'https://www.blob.com/?numbers=%5B1%2C2%2C3%5D&info=%22name%22' End Index '61' Final String 'https://www.blob.com/?numbers=%5B1%2C2%2C3%5D&info=%22name%22' Parsed
Test URL Parse 'https://www.blob.com/?numbers=%5B1%2C2%2C3%5D&info=%22name%22"ge' End Index '61' Final String 'https://www.blob.com/?numbers=%5B1%2C2%2C3%5D&info=%22name%22' Parsed
Test URL Parse 'https://www.blob.com/?numbers=%5B1%2C2%2C3%5D&info=%2Qname%22' End Index '51' Final String 'https://www.blob.com/?numbers=%5B1%2C2%2C3%5D&info=' Parsed
Test URL Parse '://www.blob.com/?numbers=%5B1%2C2%2C3%5D&info=%2Qname%22' End Index '46' Final String '://www.blob.com/?numbers=%5B1%2C2%2C3%5D&info=' DID NOT PARSE