v2: removing database (#1)

New features:
* Full refactor
* Stateless app id and tokens (database is not required anymore)
* Codebase improved
* More tests

Changes:
* dependencies updated
* workflow for testing on github actions
* include hedged nonce during sign generation
* new email package with tests and new templates definitions which support plain and html content
* update main with new changes and new workflow step to show the test coverage in a report
* new notifications and mail templates, including login mail template
* new token package with new structs to better data management, including expirations, secrets and tokens
* full api implementation with basic features, includes requests, responses, errors and initial tests
* new LICENSE and README
* new api/io package with more tests

Author: lucasmenendez

.github/parse-coverage-report.js

@@ -0,0 +1,55 @@
+const readline = require("readline");
+
+const rl = readline.createInterface({
+    input: process.stdin,
+    output: process.stdout,
+    terminal: false,
+});
+
+const summary = { fail: [], pass: [], skip: [] };
+
+rl.on("line", (line) => {
+    const output = JSON.parse(line);
+    if (
+        output.Action === "pass" ||
+        output.Action === "skip" ||
+        output.Action === "fail"
+    ) {
+        if (output.Test) {
+            summary[output.Action].push(output);
+        }
+    }
+});
+
+function totalTime(entries) {
+    return entries.reduce((total, l) => total + l.Elapsed, 0);
+}
+
+rl.on("close", () => {
+    console.log("## 📋 Tests executed");
+    console.log("| | Number of Tests | Total Time |");
+    console.log("|--|--|--|");
+    console.log(
+        "| ✅ Passed | %d | %fs |",
+        summary.pass.length,
+        totalTime(summary.pass)
+    );
+    console.log(
+        "| ❌ Failed | %d | %fs |",
+        summary.fail.length,
+        totalTime(summary.fail)
+    );
+    console.log(
+        "| 🔜 Skipped | %d | %fs |",
+        summary.skip.length,
+        totalTime(summary.skip)
+    );
+
+    if (summary.fail.length > 0) {
+        console.log("\n## Failures\n");
+    }
+
+    summary.fail.forEach((test) => {
+        console.log("* %s (%s) %fs", test.Test, test.Package, test.Elapsed);
+    });
+});

.github/workflows/main.yml

@@ -0,0 +1,75 @@
+name: Build and Test
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  job_go_checks:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+      - name: Set up Go environment
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.24"
+      - name: Tidy go module
+        run: |
+          go mod tidy
+          if [[ $(git status --porcelain) ]]; then
+            git diff
+            echo
+            echo "go mod tidy made these changes, please run 'go mod tidy' and include those changes in a commit"
+            exit 1
+          fi
+      - name: Run gofumpt
+        run: diff -u <(echo -n) <(go run mvdan.cc/gofumpt@@latest -d .)
+      - name: Run go vet
+        run: go vet ./...
+
+  job_go_test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
+      - name: Set up Go environment
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.24"
+      - name: Run Go test -race
+        run: go test ./...  -v -race -timeout=1h
+      - name: Rerun Go test to generate coverage report
+        run: |
+          go test -v -timeout 15m -coverprofile=./cover.out -json ./... > tests.log
+      - name: Convert report to html
+        run: go tool cover -html=cover.out -o cover.html
+      - name: Print coverage report
+        run: |
+          set -o pipefail && cat tests.log | node .github/parse-coverage-report.js >> $GITHUB_STEP_SUMMARY
+          echo $GITHUB_STEP_SUMMARY
+      - name: Print coverage report
+        run: |
+          go tool cover -func=cover.out > ./cover.txt
+          echo "<details><summary>📏 Tests coverage</summary>" >> $GITHUB_STEP_SUMMARY
+          echo -e "\n\`\`\`" >> $GITHUB_STEP_SUMMARY
+          cat ./cover.txt >> $GITHUB_STEP_SUMMARY
+          echo -e "\`\`\`\n</details>" >> $GITHUB_STEP_SUMMARY
+      - name: Store coverage report
+        uses: actions/upload-artifact@v4
+        with:
+          name: report
+          path: |
+            tests.log
+            cover.txt
+            cover.out
+            cover.html