refactor(repo): replace legacy openflare-server with Wavelet rename

Delete the old monolithic openflare-server implementation and rename
Wavelet/ to openflare-server/ to complete the migration consolidation.
Update CI workflows, agent Dockerfiles, and deployment docs for the new
layout (frontend/, docker/Dockerfile).

openflare-server/.editorconfig

@@ -0,0 +1,19 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+charset = utf-8
+end_of_line = lf
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.{json,yml,yaml}]
+indent_size = 2
+
+[*.md]
+insert_final_newline = false
+trim_trailing_whitespace = false
+
+[*.{js,ts,css,html,jsx,tsx,vue}]
+indent_size = 2