fix: sdk missing type completions when not used already (#2640)

Adds some basic testing for the language server (only hover and completions for now), mostly snapshot testing. This includes a cute lil macro that should make further tests pretty easy.

Also threw in a change to close #2339 by eagerly loading the SDK.

- [x] PR title matches [Winglang's style guide](https://docs.winglang.io/contributors/pull_requests#how-are-pull-request-titles-formatted)
- [x] PR description explains motivation and solution
- [x] Tests added
- [x] Docs updated
- [x] Needs end-to-end tests (`pr/e2e-full` label)

*By submitting this pull request, I confirm that my contribution is made under the terms of the [Monada Contribution License](https://docs.winglang.io/terms-and-policies/contribution-license.html)*.

.github/workflows/build.yml

@@ -21,7 +21,7 @@ concurrency:
 jobs:
   build:
     name: "Build"
-    timeout-minutes: 25
+    timeout-minutes: 30
     runs-on: ubuntu-latest
     env:
       # Testing runs out of memory without this

.insta.yaml

@@ -0,0 +1,2 @@
+behavior:
+  update: "always"

docs/06-contributors/020-development.md

@@ -169,8 +169,9 @@ Note: In CI, tests likely run much slower than on your local machine, so you may
 
 ## How do I work only on the compiler?
 
-The following command runs the cargo tests, currently just ensures the valid examples compile and the
-invalid ones do not.
+The following command runs the rust tests in wingc, including verification that valid tests compile, invalid tests do not compile, and none of them panic.
+
+It will also make sure to update any snapshots.
 
 ```sh
 npx nx test wingc
@@ -190,8 +191,11 @@ To check that your code passes all the lints, run:
 npx nx lint wingc
 ```
 
-If you are using VS Code, you can show clippy errors in your IDE by installing the rust-analyzer extension and setting the option "Rust-analyzer › Check: Command" to "clippy" instead of "check".
+### Optional VSCode extensions for working on the compiler
+
+You can show clippy errors in your IDE by installing the [rust-analyzer](https://marketplace.visualstudio.com/items?itemName=rust-lang.rust-analyzer) extension and setting the option "Rust-analyzer › Check: Command" to "clippy" instead of "check".
 
+The [insta](https://marketplace.visualstudio.com/items?itemName=mitsuhiko.insta) extension allows you to view snapshots in the tests files.
 
 ## How do I make changes to the Wing grammar?
 

libs/wingc/Cargo.toml

@@ -27,3 +27,7 @@ duplicate = "1.0.0"
 
 [lib]
 crate-type = ["rlib", "cdylib"]
+
+[dev-dependencies]
+insta = { version = "1.29.0", features = ["yaml"] }
+uuid = { version = "1.3.2", features = ["fast-rng", "v4"] }

libs/wingc/project.json

@@ -4,11 +4,16 @@
   "implicitDependencies": ["sdk", "wingii", "tree-sitter-wing"],
   "targets": {
     "test": {
-      "dependsOn": ["lint"],
+      "dependsOn": ["^build", "lint"],
       "executor": "nx:run-commands",
       "options": {
         "command": "cargo test",
         "cwd": "libs/wingc"
+      },
+      "configurations": {
+        "release": {
+          "command": "INSTA_UPDATE=\"no\" cargo test"
+        }
       }
     },
     "lint": {