feat: Provide some scripts to seed some layers (close #185)

docs/.vuepress/config.js

@@ -46,7 +46,8 @@ function getGuidesSidebar () {
 function getReferenceSidebar () {
   return [
     'environment',
-    'cli'
+    'cli',
+    'helper-scripts'
   ]
 }
 

docs/reference/helper-scripts.md

@@ -0,0 +1,37 @@
+---
+sidebarDepth: 3
+---
+
+# Helper scripts
+
+## clear-cache
+
+### Description
+
+Clears the cache of a given layer
+
+`usage: clear-cache <layer>`
+
+### Example
+
+```bash
+$./kargo exec clear-cache "osm-bright 9 6"
+```
+
+## seed-cache
+
+### Description
+
+Seeds the cache of a given layer
+
+`usage: seed-cache <layer> <max-level> <nb-threads>`
+
+Where:
+* `max-level` specifies the maximum level
+* `nb-threads` specifies the number of threads to used when seeding
+
+### Example
+
+```bash
+$./kargo exec seed-cache "osm-bright 9 6"
+```