Support multiple OpenAI compatible providers (#34212)

TODO
- [x] OpenAI Compatible API Icon
- [x] Docs
- [x] Link to docs in OpenAI provider section about configuring OpenAI
API compatible providers

Closes #33992

Related to #30010

Release Notes:

- agent: Add support for adding multiple OpenAI API compatible providers

---------

Co-authored-by: MrSubidubi <dev@bahn.sh>
Co-authored-by: Danilo Leal <daniloleal09@gmail.com>

crates/language_models/src/settings.rs

@@ -1,4 +1,7 @@
+use std::sync::Arc;
+
 use anyhow::Result;
+use collections::HashMap;
 use gpui::App;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -15,13 +18,14 @@ use crate::provider::{
     mistral::MistralSettings,
     ollama::OllamaSettings,
     open_ai::OpenAiSettings,
+    open_ai_compatible::OpenAiCompatibleSettings,
     open_router::OpenRouterSettings,
     vercel::VercelSettings,
     x_ai::XAiSettings,
 };
 
 /// Initializes the language model settings.
-pub fn init(cx: &mut App) {
+pub fn init_settings(cx: &mut App) {
     AllLanguageModelSettings::register(cx);
 }
 
@@ -36,6 +40,7 @@ pub struct AllLanguageModelSettings {
     pub ollama: OllamaSettings,
     pub open_router: OpenRouterSettings,
     pub openai: OpenAiSettings,
+    pub openai_compatible: HashMap<Arc<str>, OpenAiCompatibleSettings>,
     pub vercel: VercelSettings,
     pub x_ai: XAiSettings,
     pub zed_dot_dev: ZedDotDevSettings,
@@ -52,6 +57,7 @@ pub struct AllLanguageModelSettingsContent {
     pub ollama: Option<OllamaSettingsContent>,
     pub open_router: Option<OpenRouterSettingsContent>,
     pub openai: Option<OpenAiSettingsContent>,
+    pub openai_compatible: Option<HashMap<Arc<str>, OpenAiCompatibleSettingsContent>>,
     pub vercel: Option<VercelSettingsContent>,
     pub x_ai: Option<XAiSettingsContent>,
     #[serde(rename = "zed.dev")]
@@ -103,6 +109,12 @@ pub struct OpenAiSettingsContent {
     pub available_models: Option<Vec<provider::open_ai::AvailableModel>>,
 }
 
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq, JsonSchema)]
+pub struct OpenAiCompatibleSettingsContent {
+    pub api_url: String,
+    pub available_models: Vec<provider::open_ai_compatible::AvailableModel>,
+}
+
 #[derive(Default, Clone, Debug, Serialize, Deserialize, PartialEq, JsonSchema)]
 pub struct VercelSettingsContent {
     pub api_url: Option<String>,
@@ -226,6 +238,19 @@ impl settings::Settings for AllLanguageModelSettings {
                 openai.as_ref().and_then(|s| s.available_models.clone()),
             );
 
+            // OpenAI Compatible
+            if let Some(openai_compatible) = value.openai_compatible.clone() {
+                for (id, openai_compatible_settings) in openai_compatible {
+                    settings.openai_compatible.insert(
+                        id,
+                        OpenAiCompatibleSettings {
+                            api_url: openai_compatible_settings.api_url,
+                            available_models: openai_compatible_settings.available_models,
+                        },
+                    );
+                }
+            }
+
             // Vercel
             let vercel = value.vercel.clone();
             merge(