fix(vrl): restore stdlib functions in CLI and playground (#25310)

Author: pront

changelog.d/25267_vrl_get_env_var_playground.fix.md

@@ -0,0 +1,2 @@
+Restored the full VRL stdlib, including `get_env_var`, in the standalone VRL CLI and web playground by default.
+authors: pront

lib/vector-vrl/cli/Cargo.toml

@@ -6,6 +6,10 @@ edition = "2024"
 publish = false
 license = "MPL-2.0"
 
+[features]
+# Enable the full VRL stdlib, which includes all available VRL functions.
+default = ["vrl/stdlib"]
+
 [dependencies]
 clap.workspace = true
 vector-vrl-functions.workspace = true

lib/vector-vrl/web-playground/Cargo.toml

@@ -11,6 +11,10 @@ license = "MPL-2.0"
 [lib]
 crate-type = ["cdylib"]
 
+[features]
+# Enable the full VRL stdlib, which includes all available VRL functions.
+default = ["vrl/stdlib"]
+
 [dependencies]
 wasm-bindgen = "0.2"
 vrl.workspace = true