Change gdscript-eglot-version type to be string instead of integer

[katomuso]

Customizable variable gdscript-eglot-version is used to locate editor settings file and extract LSP port from it when connecting via Eglot. Currently, this variable is of type integer.

In godotengine/godot#90875, naming logic for the editor settings file was changed, and if you have, for example, Godot 4.3 installed, the corresponding editor settings file will be named editor_settings-4.3.tres. Because gdscript-eglot-version has an integer type and is formatted as such, it is impossible to specify the correct version of the Godot installation in that case.

I changed the type of gdscript-eglot-version to a string to be able to specify any possible version format. Also, I've bumped the value of gdscript-eglot-version to the last stable version of Godot. As stated in #154, we can improve LSP port determination further by avoiding hard-coding this value, but this is good enough for now.

[NathanLovato]

Thank you for your contribution!

[okuriashi]

Doesn't this effectively close #154?. 🤔 My comment #154 (comment) was intended as a solution but @katomuso beat me to the PR 🙇

It seems to me that the change to support older versions and >= 4.3 vesions of the settings file, together with the gdscript-eglot-version customizable variable, we have everything we need?

The mentioned scenario of multiple Godot versions seems to me an edge case, although I might be way off here as I'm not by any means a professional Godot user.

One might consider having a default for the port, but I think it's fine to assume that the configuration file is well formed. If it's not, it's always possible to provide eglot with host and port directly.

I don't think it's emacs-gdscript-mode responsibilty to try and cover all possible scenarios for Godot installations and bugs 😉 🙇

[NathanLovato]

Thank you for all the details @okuriashi !