Create Load_tiles_on_ODK.md

feat: added documentation to load mbtiles on odk collect

docs/manuals/Load_tiles_on_ODK.md

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+# Loading MBTiles on ODK Collect
+
+This guide provides detailed steps on how to manually load 
+MBTiles or custom tiles into the ODK Collect app for Android users. 
+The current process involves downloading the tiles from FMTM and 
+moving the MBTiles file to a specified path on your device.
+
+## Steps for Android Users
+
+### 1. Download and Copy the MBTiles File
+   - First, download the MBTiles file from the FMTM (Field Mapping Tile Manager).
+   - Once downloaded, locate the file on your device and copy it.
+ The file will typically be in your "Downloads" folder unless you
+specified a different download location.
+
+### 2. Navigate to the Destination Folder
+   - Open the "My Files" or "File Manager" app on your Android device.
+   - Navigate to the internal storage of your device by selecting `Device storage`.
+   - Follow the path: `Android -> data`.
+   - Locate the folder `org.odk.collect.android -> files -> layers`.
+   - If your device restricts access to this path, proceed to the
+     alternative method below.
+
+### 3. Alternative Method for Devices with Restricted Access
+   - Connect your mobile device to your computer using a data cable.
+   - Ensure you have enabled file transfer mode on your device.
+     This setting can usually be found in the notification panel
+     after connecting the cable.
+   - On your computer, open the file explorer and navigate to
+     your device's storage.
+   - Follow the path: `Device storage -> Android -> data ->
+     org.odk.collect.android -> files -> layers`.
+   - Paste the copied MBTiles file into the `layers` folder.
+     This action ensures that the MBTiles file is accessible to the ODK Collect app.
+
+### 4. Enable MBTiles in ODK Collect
+   - Open the ODK Collect app on your Android device.
+   - Navigate to the project settings where you want to add the
+   - MBTiles.
+     - You can access the settings by clicking on the three-dot
+      menu or the gear icon, depending on your version of ODK Collect.
+   - Within the project settings, go to `Maps`.
+   - Click on `Layer` and you should see the MBTiles file you
+added. Enable this layer by selecting it.
+   - Save the changes to apply the new layer settings.
+
+### 5. Load Custom Tiles in a New Form
+   - Now that the MBTiles are enabled, you can start a new form within ODK Collect.
+   - The custom tiles should automatically load on the map within the
+form, providing the customized mapping data you need.