Disable incompatible extension versions in extension view (#9938)

This PR makes it so extension versions that are incompatible with what
the current Zed instance supports are disabled in the UI, to prevent
attempting to install them.

Here's what it looks like in the extension version picker:

<img width="589" alt="Screenshot 2024-03-28 at 4 21 15 PM"
src="https://github.com/zed-industries/zed/assets/1486634/8ef11c72-c8f0-4de8-a73b-5c82e96f6bfe">

Release Notes:

- N/A

crates/extension/src/extension_store.rs

@@ -7,6 +7,7 @@ mod wasm_host;
 #[cfg(test)]
 mod extension_store_test;
 
+use crate::extension_manifest::SchemaVersion;
 use crate::{extension_lsp_adapter::ExtensionLspAdapter, wasm_host::wit};
 use anyhow::{anyhow, bail, Context as _, Result};
 use async_compression::futures::bufread::GzipDecoder;
@@ -50,7 +51,7 @@ use util::{
     paths::EXTENSIONS_DIR,
     ResultExt,
 };
-use wasm_host::{WasmExtension, WasmHost};
+use wasm_host::{wit::is_supported_wasm_api_version, WasmExtension, WasmHost};
 
 pub use extension_manifest::{
     ExtensionLibraryKind, ExtensionManifest, GrammarManifestEntry, OldExtensionManifest,
@@ -60,7 +61,29 @@ pub use extension_settings::ExtensionSettings;
 const RELOAD_DEBOUNCE_DURATION: Duration = Duration::from_millis(200);
 const FS_WATCH_LATENCY: Duration = Duration::from_millis(100);
 
-const CURRENT_SCHEMA_VERSION: i64 = 1;
+/// The current extension [`SchemaVersion`] supported by Zed.
+const CURRENT_SCHEMA_VERSION: SchemaVersion = SchemaVersion(1);
+
+/// Returns whether the given extension version is compatible with this version of Zed.
+pub fn is_version_compatible(extension_version: &ExtensionMetadata) -> bool {
+    let schema_version = extension_version.manifest.schema_version.unwrap_or(0);
+    if CURRENT_SCHEMA_VERSION.0 < schema_version {
+        return false;
+    }
+
+    if let Some(wasm_api_version) = extension_version
+        .manifest
+        .wasm_api_version
+        .as_ref()
+        .and_then(|wasm_api_version| SemanticVersion::from_str(wasm_api_version).ok())
+    {
+        if !is_supported_wasm_api_version(wasm_api_version) {
+            return false;
+        }
+    }
+
+    true
+}
 
 pub struct ExtensionStore {
     builder: Arc<ExtensionBuilder>,