Naming: use Developer Mode instead of Figma's Dev Mode (#2135)

Figma holds a US registration for DEV MODE (US 7574348). Display text only: the view.devMode label, Inspect tab, shortcut row, refusal messages, CLI help, docs and all locale catalogs now say Developer Mode. Command ids, preference keys and saved fields are unchanged; "Dev Mode" stays a search alias in the Actions palette. Adds a naming guard test.

apps/figcraft-cli/src/args.rs

@@ -243,7 +243,7 @@ pub enum ConnectCommand {
 
 /// Link a design file's components to their code as a figcraft.connect.json says, and save it
 ///
-/// The mappings are what Dev Mode's Export code connections writes, kept in the code repository:
+/// The mappings are what Developer Mode's Export code connections writes, kept in the code repository:
 /// each links a component (or component set) of that name to its code component for a language.
 /// Entries that don't fit (an unknown component, a bad template) are reported and skipped.
 #[derive(Args)]