feat: fix minor bugs

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/cuddle/src/schema_validator.rs

@@ -0,0 +1,30 @@
+use nickel::NickelSchemaValidator;
+
+use crate::{
+    plan::{RawPlan, RawPlanSchema},
+    project::RawProject,
+};
+
+mod nickel;
+
+pub struct SchemaValidator {}
+
+impl SchemaValidator {
+    pub fn new() -> Self {
+        Self {}
+    }
+
+    pub fn validate(&self, plan: &RawPlan, project: &RawProject) -> anyhow::Result<Option<()>> {
+        let schema = match &plan.config.plan.schema {
+            Some(schema) => schema,
+            None => return Ok(None),
+        };
+
+        match schema {
+            RawPlanSchema::Nickel { nickel } => Ok(Some(NickelSchemaValidator::validate(
+                plan, project, nickel,
+            )?)),
+            RawPlanSchema::JsonSchema { jsonschema } => todo!("jsonschema not implemented yet"),
+        }
+    }
+}