feat: add quick reference to SQL token types

docs/SQL_Token_Types.md

@@ -0,0 +1,37 @@
+These are the SQL Token Types that will serve as the foundation on how we interpret SQL strings 
+and create our `Query` structs
+
+```go
+type TokenType int
+
+const (
+    ERROR TokenType = iota // 0
+    EOF                    // 1
+    SPACE                  // 2 space or newline
+    STRING                 // 3 string literal
+    INCOMPLETE_STRING      // 4 incomplete string literal so that we can obfuscate it, e.g. 'abc
+    NUMBER                 // 5 number literal
+    IDENT                  // 6 identifier column name
+    QUOTED_IDENT           // 7 quoted identifier
+    OPERATOR               // 8 operator like = > < >= <=
+    WILDCARD               // 9 wildcard *
+    COMMENT                // 10 comment
+    MULTILINE_COMMENT      // 11 multiline comment
+    PUNCTUATION            // 12 punctuation such as a comma
+    DOLLAR_QUOTED_FUNCTION // 13 dollar quoted function
+    DOLLAR_QUOTED_STRING   // 14 dollar quoted string
+    POSITIONAL_PARAMETER   // 15 numbered parameter
+    BIND_PARAMETER         // 16 bind parameter
+    FUNCTION               // 17 function
+    SYSTEM_VARIABLE        // 18 system variable
+    UNKNOWN                // 19 unknown token
+    COMMAND                // 20 SQL commands like SELECT INSERT UPDATE DELETE
+    KEYWORD                // 21 Other SQL keywords like FROM, WHERE, NOT, IS, LIKE
+    JSON_OP                // 22 JSON operators
+    BOOLEAN                // 23 boolean literal
+    NULL                   // 24 null literal
+    PROC_INDICATOR         // 25 procedure indicator
+    CTE_INDICATOR          // 26 CTE indicator
+    ALIAS_INDICATOR        // 27 alias indicator
+)
+```