feat: support Apex language

Author: xi xiao

README.md

@@ -296,6 +296,7 @@ If it helps to understand these, you can look at the built-in configurations in
 | Comment/uncomment all debug lines                                   | :+1:              | :x:                                                            | :x:                                                       | :x:                                                                  | :x:                                                 | :x:                                                   |
 | Can put debugprint text into default register                       | :x:               | :x:                                                            | :+1:                                                      | :x:                                                                  | :x:                                                 | :x:                                                   |
 | *Built-in support for:*                                             | -                 | -                                                              | -                                                         | -                                                                    | -                                                   | -                                                     |
+| Apex                                                                | :+1:              | :x:                                                            | :x:                                                       | :x:                                                                  | :x:                                                 | :x:                                                   |
 | AppleScript                                                         | :+1:              | :+1:                                                           | :x:                                                       | :x:                                                                  | :x:                                                 | :x:                                                   |
 | bash/sh                                                             | :+1:              | :+1:                                                           | :+1:                                                      | :x:                                                                  | :+1:                                                | :x:                                                   |
 | C                                                                   | :+1:              | :x:                                                            | :x:                                                       | :x:                                                                  | :x:                                                 | :x:                                                   |

lua/debugprint/filetypes.lua

@@ -62,6 +62,13 @@ local cs = {
 
 ---@type DebugprintFileTypeConfig[]
 return {
+    ["apex"] = {
+        left = "System.debug('",
+        left_var = "System.debug('",
+        right = "');",
+        mid_var = "' + ",
+        right_var = ");",
+    },
     ["applescript"] = {
         left = 'log "',
         right = '"',