Glyph enum doesn't contain LocalFunction

[Neme12]

discovered here: #26165 (comment)
See https://github.com/dotnet/roslyn/blob/master/src/Features/Core/Portable/Common/Glyph.cs

Local functions are currently treated as private methods. They should have their own definition which should probably also be exposed in the IDE with a new icon.

I suppose it could either be a completely new icon as some sort of mix between the icon for a local and a method, or just have a different "subicon" instead of the lock which repesents private:

[Neme12]

Looking at the pattern with other icons and (assuming that square brackets represent something is "local") extending it, I imagine it could look like this:

[Neme12]

Note: The reason I think a separate icon would be appropriate is that if the user has a local function naming preference set to other than local variables, during a local variable declaration, it may be odd to see a method icon as a naming suggestion:

a special icon for local functions would help make this clear.

[dpoeschl]

Design Meeting Notes

• We like the idea, and can get an icon created for this. We can then surface it in the editor.

[CyrusNajmabadi]

Nice!