feat: comprehensive query files for all block types and VAR sections (Phase 3)

Update all 5 tree-sitter query files to cover the full grammar:

highlights.scm:
- Add highlights for new literals (binary, octal, date, bool, typed_int,
  wstring, char)
- Add highlights for block names (organization_block, function_block,
  function, data_block, type_definition)
- Add highlights for return_statement, goto_statement, title_statement
- Add highlights for bit_access, method_callee
- Add compound assignment operators (+=, -=, *=, /=, etc.)

indents.scm:
- Add function, type_definition, data_block to @indent.begin
- Add all var_*_declaration variants to @indent.begin
- Add struct_type to @indent.begin
- Add END_FUNCTION, END_TYPE, END_DATA_BLOCK, END_STRUCT to @indent.end

folds.scm:
- Add function, type_definition, data_block to @fold
- Add all var_*_declaration variants to @fold
- Add struct_type to @fold

locals.scm:
- Add function, type_definition, data_block as @local.scope
- Add all var_*_declaration variants as @local.scope
- Add struct_type as @local.scope
- Add block name definitions (@definition.function, @definition.class,
  @definition.type)
- Narrow @reference to prefixed_identifier only (reduces noise)

tags.scm:
- Add function, data_block, type_definition tags
- Add FB call references
- Add region_statement as @definition.module

queries/scl/highlights.scm

@@ -1,66 +1,99 @@
 ; SCL highlights
 
+; Comments
 (line_comment) @comment
 (block_comment) @comment
 (c_style_comment) @comment
 
+; Literals
 (number) @number
 (hex_number) @number
-(string) @string
+(binary_number) @number
+(octal_number) @number
 (time_value) @number
+(date_literal) @number
+(bool_literal) @constant.builtin
+(typed_int_literal) @number
+(wstring_literal) @string
+(char_literal) @character
+(string) @string
 
+; Prefix
 (prefix) @punctuation.special
 
+; Variables and identifiers
 (identifier) @variable
 
-; FB instance calls - highlight instance name as type
+; FB instance calls
 (fb_call
   instance: (prefixed_identifier
     (identifier) @type))
 (fb_call
   instance: (identifier) @type)
 
-; FB parameter names (IN :=, PT :=, etc.)
+; FB parameter names
 (fb_parameter
   name: (identifier) @property)
 
 ; Function call names
 (function_call
   (identifier) @function)
+(function_call
+  (string) @function)
+
+; Method call names
+(method_callee
+  (identifier) @function)
 
 ; Variable declarations
 (var_item
   name: (identifier) @variable)
 
-; Type references in declarations
+; Type references
 (type
   (identifier) @type)
-
 (type_builtin) @type.builtin
 
+; Keywords and operators
 (keyword) @keyword
 (constant) @constant.builtin
 (operator) @operator
 
-(assignment) @operator
-(binary_expression) @operator
-(unary_expression) @operator
+; Block names
+(organization_block
+  name: (string) @type)
+(function_block
+  name: (string) @type)
+(function
+  name: (string) @function)
+(data_block
+  name: (string) @type)
+(type_definition
+  name: (string) @type)
 
+; Access
 (field_access
   "."
   (identifier) @property)
-
 (array_access) @property
+(bit_access) @property
 
+; Attributes
 (attribute_list) @attribute
 (attribute) @attribute
 (attribute_value) @string
 
-(var_item) @property
+; Statements
+(assignment) @operator
+(binary_expression) @operator
+(unary_expression) @operator
+(chained_assignment) @operator
 
+; Function/FB calls
 (function_call) @function.call
 (fb_call) @function.call
 
+; Control flow
 (if_statement) @conditional
 (elsif_clause) @conditional
 (else_clause) @conditional
@@ -71,6 +104,13 @@
 (while_statement) @repeat
 (repeat_statement) @repeat
 
+(return_statement) @keyword
+(goto_statement) @keyword
+
+; Title
+(title_statement) @comment
+
+; Punctuation
 ";" @punctuation.delimiter
 ":" @punctuation.delimiter
 "," @punctuation.delimiter
@@ -80,15 +120,22 @@
 "]" @punctuation.bracket
 "." @punctuation.delimiter
 
+; Operators
 ":=" @operator
 "=>" @operator
+"+=" @operator
+"-=" @operator
+"*=" @operator
+"/=" @operator
+"&=" @operator
+"|=" @operator
+"^=" @operator
 "=" @operator
 "<>" @operator
 "<" @operator
 ">" @operator
 "<=" @operator
 ">=" @operator
-
 "+" @operator
 "-" @operator
 "*" @operator