chore(edit-docs): move Markdown documentation outside src for now

docs/User Guide/User Guide/Advanced Usage/Advanced Showcases/Weight Tracker.md

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+# Weight Tracker
+![](Weight Tracker_image.png)
+
+The `Weight Tracker` is a [Script API](../Code%20Notes/Script%20API.md) showcase present in the [demo notes](../Database.md).
+
+By adding `weight` as a [promoted attribute](../Attributes/Promoted%20Attributes.md) in the [template](../Attributes/Template.md) from which [day notes](Day%20Notes.md) are created, you can aggregate the data and plot weight change over time.
+
+## Implementation
+
+The `Weight Tracker` note in the screenshot above is of the type `Render Note`. That type of note doesn't have any useful content itself. Instead it is a placeholder where a [script](../Code%20Notes/Scripts.md) can render its output.
+
+Scripts for `Render Notes` are defined in a [relation](../Attributes.md) called `~renderNote`. In this example, it's the `Weight Tracker`'s child `Implementation`. The Implementation consists of two [code notes](../Code%20Notes.md) that contain some HTML and JavaScript respectively, which load all the notes with a `weight` attribute and display their values in a chart.
+
+To actually render the chart, we're using a third party library called [chart.js](https://www.chartjs.org/)which is imported as an attachment, since it's not built into Trilium.
+
+### Code
+
+Here's the content of the script which is placed in a [code note](../Code%20Notes.md) of type `JS Frontend`:
+
+```
+async function getChartData() {
+    const days = await api.runOnBackend(async () => {
+        const notes = api.getNotesWithLabel('weight');
+        const days = [];
+
+        for (const note of notes) {
+            const date = note.getLabelValue('dateNote');
+            const weight = parseFloat(note.getLabelValue('weight'));
+
+            if (date && weight) {
+                days.push({ date, weight });
+            }
+        }
+
+        days.sort((a, b) => a.date > b.date ? 1 : -1);
+
+        return days;
+    });
+
+    const datasets = [
+        {
+            label: "Weight (kg)",
+            backgroundColor: 'red',
+            borderColor: 'red',
+            data: days.map(day => day.weight),
+            fill: false,
+            spanGaps: true,
+            datalabels: {
+                display: false
+            }
+        }
+    ];
+
+    return {
+        datasets: datasets,
+        labels: days.map(day => day.date)
+    };
+}
+
+const ctx = $("#canvas")[0].getContext("2d");
+
+new chartjs.Chart(ctx, {
+    type: 'line',
+    data: await getChartData()
+});
+```
+
+## How to remove the Weight Tracker button from the top bar
+
+In the link map of the `Weight Tracker`, there is a note called `Button`. Open it and delete or comment out its contents. The `Weight Tracker` button will disappear after you restart Trilium.