Add tests for 2023 puzzles, day 1 + 2

* Add test resources

solutions/src/test/kotlin/com/edricchan/aoc/year2023/Year2023Puzzles.kt

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+package com.edricchan.aoc.year2023
+
+import com.edricchan.aoc.puzzle.dsl.puzzle
+import com.edricchan.aoc.puzzle.dsl.puzzles
+import com.edricchan.aoc.puzzle.input.input
+import java.time.Year
+
+val puzzles = puzzles(Year.of(2023)) {
+    puzzle(1, Day01(), 142, 142 /* same result... */)
+    resourceLoader.getResourceAsPath("input-words.txt")?.let { path ->
+        puzzle(1, ::Day01) {
+            // Part 1 assumes that lines with no valid values are skipped
+            withInput(path.input, 209, 281)
+        }
+    }
+
+    puzzle(2, Day02(), 8, 2286)
+}

solutions/src/test/kotlin/com/edricchan/aoc/year2023/Year2023Tests.kt

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+package com.edricchan.aoc.year2023
+
+import com.edricchan.aoc.puzzle.AbstractPuzzleTests
+
+class Year2023Tests : AbstractPuzzleTests(puzzles)

solutions/src/test/resources/aoc/year2023/day1/input-words.txt

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+two1nine
+eightwothree
+abcone2threexyz
+xtwone3four
+4nineeightseven2
+zoneight234
+7pqrstsixteen

solutions/src/test/resources/aoc/year2023/day1/input.txt

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+1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet

solutions/src/test/resources/aoc/year2023/day2/input.txt

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+Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green