feat(mermaid): add link to docs (closes #5378)

Author: eliandoran

apps/client/src/services/in_app_help.ts

@@ -10,7 +10,7 @@ export const byNoteType: Record<Exclude<NoteType, "book">, string | null> = {
     file: null,
     image: null,
     launcher: null,
-    mermaid: null,
+    mermaid: "s1aBHPd79XYj",
     mindMap: null,
     noteMap: null,
     relationMap: null,

apps/server/src/assets/doc_notes/en/User Guide/!!!meta.json

@@ -8838,6 +8838,13 @@
                                     "value": "bx bx-selection",
                                     "isInheritable": false,
                                     "position": 20
+                                },
+                                {
+                                    "type": "relation",
+                                    "name": "internalLink",
+                                    "value": "WWgeUaBb7UfC",
+                                    "isInheritable": false,
+                                    "position": 30
                                 }
                             ],
                             "format": "markdown",
@@ -8921,6 +8928,33 @@
                                             "dataFileName": "ELK layout_ELK on.svg"
                                         }
                                     ]
+                                },
+                                {
+                                    "isClone": false,
+                                    "noteId": "WWgeUaBb7UfC",
+                                    "notePath": [
+                                        "pOsGYCXsbNQG",
+                                        "KSZ04uQ2D1St",
+                                        "s1aBHPd79XYj",
+                                        "WWgeUaBb7UfC"
+                                    ],
+                                    "title": "Syntax reference",
+                                    "notePosition": 40,
+                                    "prefix": null,
+                                    "isExpanded": false,
+                                    "type": "webView",
+                                    "mime": "",
+                                    "attributes": [
+                                        {
+                                            "type": "label",
+                                            "name": "webViewSrc",
+                                            "value": "https://mermaid.js.org/intro/syntax-reference.html",
+                                            "isInheritable": false,
+                                            "position": 10
+                                        }
+                                    ],
+                                    "dataFileName": "Syntax reference.dat",
+                                    "attachments": []
                                 }
                             ]
                         },

apps/server/src/assets/doc_notes/en/User Guide/User Guide/Note Types/Mermaid Diagrams.html

@@ -1,10 +1,11 @@
 # Mermaid Diagrams
+> [!TIP]
+> For a quick understanding of the Mermaid syntax, see <a class="reference-link" href="Mermaid%20Diagrams/Syntax%20reference.dat">Syntax reference</a> (official documentation).
+
 <figure class="image image-style-align-center"><img style="aspect-ratio:886/663;" src="2_Mermaid Diagrams_image.png" width="886" height="663"></figure>
 
 Trilium supports Mermaid, which adds support for various diagrams such as flowchart, sequence diagram, class diagram, state diagram, pie charts, etc., all using a text description of the chart instead of manually drawing the diagram.
 
-For the official documentation of Mermaid.js see [mermaid.js.org/intro/](https://mermaid.js.org/intro/).
-
 ## Layouts
 
 Depending on the chart being edited and user preference, there are two layouts supported by the Mermaid note type: