Clean up stale directories and fix monorepo structure

- Remove remaining home-assistant-integration/ and dev-config/
- Move dashboard to repo root for proper monorepo layout
- Remove crash dumps and symlinks
- Clean structure: server/ and dashboard/ at root level

dashboard/priv/gettext/en/LC_MESSAGES/errors.po

@@ -0,0 +1,11 @@
+## `msgid`s in this file come from POT (.pot) files.
+##
+## Do not add, change, or remove `msgid`s manually here as
+## they're tied to the ones in the corresponding POT file
+## (with the same domain).
+##
+## Use `mix gettext.extract --merge` or `mix gettext.merge`
+## to merge POT files into PO files.
+msgid ""
+msgstr ""
+"Language: en\n"

dashboard/priv/gettext/errors.pot

@@ -0,0 +1,10 @@
+## This is a PO Template file.
+##
+## `msgid`s here are often extracted from source code.
+## Add new translations manually only if they're dynamic
+## translations that can't be statically extracted.
+##
+## Run `mix gettext.extract` to bring this file up to
+## date. Leave `msgstr`s empty as changing them here has no
+## effect: edit them in PO (`.po`) files instead.
+