[Feature] UI Shortcuts + Hints for Working with Mermaid Diagrams

[Aligorith]

Problem Description

For someone who regularly has to switch between different markup languages / environments, it is sometimes hard to remember what the relevant syntax is for enabling Mermaid support in a particular Markdown flavour.

Proposed Solution

Ideally, the following tweaks would be made to the UI to make this easier:

1. Add a toolbar entry (like one of the "format" options) that will insert a "```mermaid" block into the text at the cursor
2. In the Help popup, have a section showing hints for supported types and/or syntax examples - This can be as simple as just displaying the contents of one of the "docs/*.md" files

Alternative Solutions

Simple Extension:
The toolbar entry could be like the "Headings" dropdown, showing a list of the available / supported diagram types, and clicking on one of those would insert the sample graph code into the doc to act as a template to start from.

More Effort Solution:
Have some kind of guided wizard for setting these up.

Use Cases

1. Helping new users learn that the feature is available, and/or how to use it
2. Helping people who use multiple markup languages across different platforms know how they can invoke these diagrams in this environment

Priority

How important is this feature to your workflow?

• Critical - blocking my work
• High - significant improvement
• Medium - nice to have
• Low - minor convenience

[Aligorith]

As a slight tangent: Having something similar for creating tables would also be useful, but that is another large can of worms of effort by itself too

[OlaProeis]

Great suggestion! Making Mermaid more discoverable is definitely on my radar.

I've added both items to the v0.3.0 roadmap:

• Toolbar button to insert mermaid code blocks (with a dropdown showing available diagram types)
• Help section with syntax examples for each supported diagram type

These are lower priority than some other v0.3.0 items (like the mermaid crate extraction), but they're on the list. PRs welcome if you'd like to tackle either of these!