Update cheatsheets

tldr/opencode-import

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# opencode import
+
+> Import session data from a JSON file or URL.
+> More information: <https://opencode.ai/docs/cli#import>.
+
+- Import from a JSON file:
+
+`opencode import {{path/to/session}}.json`
+
+- Import from a share URL:
+
+`opencode import {{URL}}`
+
+- Display help:
+
+`opencode import {{[-h|--help]}}`