Update articles

[Srihari2222]

Add TypeScript solutions to multiple algorithm articles

• Adds TypeScript implementations for 8 algorithm articles: average waiting time, vowel strings in ranges, browser history, find common characters, relative sort array, remove duplicates from sorted array II, sort people, special array, and time needed to buy tickets.
• Each article receives multiple TypeScript approaches (brute force, optimal, and intermediate strategies) mirroring existing solutions in other languages.
• Fixes the C# Solution.CommonChars return type from IList<string> to List<string> in find-common-characters.md.
• Adds C# queue simulation, iteration, and one-pass solutions to time-needed-to-buy-tickets.md.

^{Macroscope summarized a6ff471.}

[macroscopeapp]

🟢 Low articles/remove-duplicates-from-sorted-array-ii.md:599

The second count.set(num, cnt - 1) on line 603 uses the original destructured cnt instead of decrementing the already-decremented value, so it sets the count back to cnt - 1 instead of cnt - 2. This contradicts the Rust version which correctly decrements twice, and misrepresents the algorithm's logic in an educational article. Consider changing to count.set(num, cnt - 2) to correctly reflect the double-decrement.

Suggested change

	nums[i++] = num;
	count.set(num, cnt - 1);
	if (count.get(num)! >= 1) {
	nums[i++] = num;
	count.set(num, cnt - 1);
	}
	count.set(num, cnt - 1);
	if (count.get(num)! >= 1) {
	nums[i++] = num;
	count.set(num, cnt - 2);
	}

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In file articles/remove-duplicates-from-sorted-array-ii.md around lines 599-604:

The second `count.set(num, cnt - 1)` on line 603 uses the original destructured `cnt` instead of decrementing the already-decremented value, so it sets the count back to `cnt - 1` instead of `cnt - 2`. This contradicts the Rust version which correctly decrements twice, and misrepresents the algorithm's logic in an educational article. Consider changing to `count.set(num, cnt - 2)` to correctly reflect the double-decrement.