fix(generator): replace gotmpl with gomplate

docs/index.md

@@ -19,7 +19,7 @@ Soonix helps you:
 - **nix**: Convert Nix data to JSON, YAML, TOML, INI, XML formats
 - **string**: Output raw string content with optional executable permissions
 - **derivation**: Use existing Nix derivations as file content
-- **gotmpl**: Advanced Go template rendering via gomplate
+- **gomplate**: Advanced Go template rendering via gomplate
 - **jinja**: Python Jinja2 template rendering
 
 ### Automatic File Management
@@ -63,7 +63,7 @@ Automatically manage .gitignore entries for generated files to keep your reposit
 
         dockerfile = {
           output = "Dockerfile";
-          generator = "gotmpl";
+          generator = "gomplate";
           data = {
             baseImage = "node:18-alpine";
             port = 3000;

docs/usage.md

@@ -100,7 +100,7 @@ Use Go templates for more complex file generation:
 hooks = {
   dockerfile = {
     output = "Dockerfile";
-    generator = "gotmpl";
+    generator = "gomplate";
     data = {
       baseImage = "node:18-alpine";
       workdir = "/app";
@@ -331,7 +331,7 @@ in {
 hooks = {
   kubernetes-manifest = {
     output = "k8s/deployment.yaml";
-    generator = "gotmpl";
+    generator = "gomplate";
     data = {
       app = {
         name = "my-app";