Add solution for puzzle 02

Author: AlexeyMz

Diff for: .editorconfig

@@ -10,5 +10,5 @@ trim_trailing_whitespace = true
 insert_final_newline = true
 end_of_line = lf
 
-[*.ts]
+[*.{ts,mts}]
 indent_size = 2

Diff for: src/puzzle02.mts

@@ -0,0 +1,85 @@
+import { readFile } from 'node:fs/promises';
+
+import { getDataPath } from './core/project.mjs';
+
+export async function solvePuzzle02Basic() {
+  const content = await readFile(getDataPath('input/puzzle02.txt'), {encoding: 'utf8'});
+  const reports = parseReports(content);
+
+  let safeCount = 0;
+  for (const report of reports) {
+    if (isSafeReport(report, 1, 3) || isSafeReport(report, -3, -1)) {
+      safeCount++;
+    }
+  }
+
+  console.log(`Puzzle 02 (basic): ${safeCount}`);
+}
+
+export async function solvePuzzle02Advanced() {
+  const content = await readFile(getDataPath('input/puzzle02.txt'), {encoding: 'utf8'});
+  const reports = parseReports(content);
+
+  let safeCount = 0;
+  for (const report of reports) {
+    if (isSafeReport(report, 1, 3, true) || isSafeReport(report, -3, -1, true)) {
+      safeCount++;
+    }
+  }
+
+  console.log(`Puzzle 02 (advanced): ${safeCount}`);
+}
+
+function parseReports(content: string): Array<number[]> {
+  const reports: Array<number[]> = [];
+  for (const line of content.split(/\r?\n/g)) {
+    if (!line) {
+      continue;
+    }
+    const report = line.split(' ').map(item => Number(item));
+    reports.push(report);
+  }
+  return reports;
+}
+
+function isSafeReport(
+  report: readonly number[],
+  minDiff: number,
+  maxDiff: number,
+  allowSkip = false,
+  skipAt?: number
+): boolean {
+  const end = rangeEnd(report.length, skipAt);
+  let previous = rangeStart(report.length, skipAt);
+  for (let i = rangeNext(previous, skipAt); i < end; i = rangeNext(i, skipAt)) {
+    const diff = report[i] - report[previous];
+    if (diff < minDiff || diff > maxDiff) {
+      if (allowSkip) {
+        return (
+          isSafeReport(report, minDiff, maxDiff, false, previous) ||
+          isSafeReport(report, minDiff, maxDiff, false, i)
+        );
+      }
+      return false;
+    }
+    previous = i;
+  }
+  return true;
+}
+
+function rangeStart(_length: number, skipAt: number | undefined): number {
+  return skipAt === 0 ? 1 : 0;
+}
+
+function rangeEnd(length: number, skipAt: number | undefined): number {
+  return skipAt === length ? length - 1 : length;
+}
+
+function rangeNext(index: number, skipAt: number | undefined): number {
+  return index + 1 === skipAt ? index + 2 : index + 1;
+}
+
+(async function main() {
+  await solvePuzzle02Basic();
+  await solvePuzzle02Advanced();
+})();