debugger: Use DAP schema to configure daps (#30833)

This PR allows DAPs to define their own schema so users can see
completion items when editing their debug.json files.

Users facing this aren’t the biggest chance, but behind the scenes, this
affected a lot of code because we manually translated common fields from
Zed's config format to be adapter-specific. Now we store the raw JSON
from a user's configuration file and just send that.

I'm ignoring the Protobuf CICD error because the DebugTaskDefinition
message is not yet user facing and we need to deprecate some fields in
it.

Release Notes:

- debugger beta: Show completion items when editing debug.json
- debugger beta: Breaking change, debug.json schema now relays on what
DAP you have selected instead of always having the same based values.

---------

Co-authored-by: Remco Smits <djsmits12@gmail.com>
Co-authored-by: Cole Miller <m@cole-miller.net>
Co-authored-by: Cole Miller <cole@zed.dev>

crates/task/src/adapter_schema.rs

@@ -0,0 +1,62 @@
+use anyhow::Result;
+use gpui::SharedString;
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+use serde_json::json;
+
+/// Represents a schema for a specific adapter
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]
+pub struct AdapterSchema {
+    /// The adapter name identifier
+    pub adapter: SharedString,
+    /// The JSON schema for this adapter's configuration
+    pub schema: serde_json::Value,
+}
+
+#[derive(Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
+#[serde(transparent)]
+pub struct AdapterSchemas(pub Vec<AdapterSchema>);
+
+impl AdapterSchemas {
+    pub fn generate_json_schema(&self) -> Result<serde_json_lenient::Value> {
+        let adapter_conditions = self
+            .0
+            .iter()
+            .map(|adapter_schema| {
+                let adapter_name = adapter_schema.adapter.to_string();
+                json!({
+                    "if": {
+                        "properties": {
+                            "adapter": { "const": adapter_name }
+                        }
+                    },
+                    "then": adapter_schema.schema
+                })
+            })
+            .collect::<Vec<_>>();
+
+        let schema = serde_json_lenient::json!({
+            "$schema": "http://json-schema.org/draft-07/schema#",
+            "title": "Debug Adapter Configurations",
+            "description": "Configuration for debug adapters. Schema changes based on the selected adapter.",
+            "type": "array",
+            "items": {
+                "type": "object",
+                "required": ["adapter", "label"],
+                "properties": {
+                    "adapter": {
+                        "type": "string",
+                        "description": "The name of the debug adapter"
+                    },
+                    "label": {
+                        "type": "string",
+                        "description": "The name of the debug configuration"
+                    },
+                },
+                "allOf": adapter_conditions
+            }
+        });
+
+        Ok(serde_json_lenient::to_value(schema)?)
+    }
+}