Swedish adaptation: Instegscertifikat and HAREC content

- Sections and slides rewritten in Swedish; German law and institutions replaced by
  Swedish/CEPT/ITU equivalents (PTS, SSA, PTSFS 2025:1, SSMFS 2008:18), unverified
  statements marked "% TODO VERIFY"
- New toc: INSTEG, HAREC, UPPGRADERING; section idents are Swedish (see ident-map.tsv)
- Exam-question tags, BNetzA question pool, solutions and the German SWL course removed
- Static pages, snippets, applets, READMEs and image alt-texts translated
- TikZ labels translated; SVG drawings regenerated (drawing 689 still fails to build
  upstream: it references a missing photo)
- Changed from the original: not endorsed by DARC e.V., SSA or PTS

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

contents/html/fading_applet.html

@@ -4,7 +4,7 @@
     <table>
         <tr>
             <td>
-                <p>Amplitude: </p>
+                <p>Amplitud: </p>
             </td>
             <td>
                 <input type="range" class="slider" value="80" min="0" max="100" id="amplitude">
@@ -15,7 +15,7 @@
         </tr>
         <tr>
             <td>
-                <p>Phase:</p>
+                <p>Fas:</p>
             </td>
             <td>
                 <input type="range" class="slider" value="180" min="0" max="360" id="phase">
@@ -40,14 +40,14 @@
                 labels: [],
                 datasets: [
                     {
-                        label: "Raumwelle",
+                        label: "Rymdvåg",
                         fill: false,
                         pointRadius: 0,
                         borderColor: "#00AEDF",
                         data: [],
                     },
                     {
-                        label: "Bodenwelle",
+                        label: "Markvåg",
                         fill: false,
                         pointRadius: 0,
                         borderColor: "#40C08C",
@@ -62,7 +62,7 @@
                     x: {
                         title: {
                             display: true,
-                            text: 'Zeit'
+                            text: 'Tid'
                         },
                         ticks: {
                             callback: function(val, index) {
@@ -89,7 +89,7 @@
                 labels: [],
                 datasets: [
                     {
-                        label: "Summiertes Signal",
+                        label: "Summerad signal",
                         fill: false,
                         pointRadius: 0,
                         borderColor: "#ED7D71",
@@ -112,7 +112,7 @@
                     x: {
                         title: {
                             display: true,
-                            text: 'Zeit'
+                            text: 'Tid'
                         },
                         ticks: {
                             callback: function(val, index) {
@@ -140,7 +140,7 @@
         function generateValues(i1, i2, step = 1) {
             // Reset all values:
             fading.data.datasets[0].data = []; // Nutzsignal
-            fading.data.datasets[1].data = []; // Gefadetes Signal
+            fading.data.datasets[1].data = []; // fadad signal
             sum.data.datasets[0].data = [];
             sum.data.labels = [];
             fading.data.labels = [];
@@ -150,7 +150,7 @@
                 // Nutzsignal:
                 fading.data.datasets[0].data.push(100*Math.sin(x));
                 fading.data.labels.push(x);
-                // Gefadetes Signal:
+                // fadad signal:
                 fading.data.datasets[1].data.push(amplitude*Math.sin(x+(phase/360)*2*Math.PI));
                 // Set Sum:
                 sum.data.datasets[0].data.push(100*Math.sin(x) + amplitude*Math.sin(x+(phase/360)*2*Math.PI))