fix: resolve duplicate case patterns in Language enum

- Remove .m from Mathematica and Octave cases, keep only Objective-C mapping
- Remove .sig from SML case to avoid conflict with PGP mapping
- Remove .v from SystemVerilog case to avoid conflict with Verilog mapping
- This fixes compilation errors caused by duplicate case patterns in switch statement

Author: jaywcjlove

Sources/CodeMirror/Language.swift

@@ -301,7 +301,7 @@ public enum Language: String, CaseIterable, Hashable, Identifiable {
         case .ls: "LiveScript"
         case .lua: "Lua"
         case .mrc: "mIRC"
-        case .m, .nb, .wl, .wls: "Mathematica"
+        case .nb, .wl, .wls: "Mathematica"
         case .mo: "Modelica"
         case .mps: "MUMPS"
         case .mbox: "Mbox"
@@ -310,7 +310,6 @@ public enum Language: String, CaseIterable, Hashable, Identifiable {
         case .m: "Objective-C"
         case .mm: "Objective-C++"
         case .ml, .mli, .mll, .mly: "OCaml"
-        case .m: "Octave"
         case .oz: "Oz"
         case .p, .pas: "Pascal"
         case .pl, .pm: "Perl"
@@ -330,13 +329,13 @@ public enum Language: String, CaseIterable, Hashable, Identifiable {
         case .sh, .ksh, .bash: "Shell"
         case .siv, .sieve: "Sieve"
         case .st: "Smalltalk"
-        case .sml, .sig, .fun, .smackspec: "SML"
+        case .sml, .fun, .smackspec: "SML"
         case .rq, .sparql: "SPARQL"
         case .nut: "Squirrel"
         case .styl: "Stylus"
         case .swift: "Swift"
         case .text, .ltx, .tex: "LaTeX"
-        case .v, .sv, .svh: "SystemVerilog"
+        case .sv, .svh: "SystemVerilog"
         case .tcl: "Tcl"
         case .textile: "Textile"
         case .toml: "TOML"