fix(generators): Changes to exports and access controls for TypeScript compatibility (#7295)

* fix(generators): Add missing declarations for Order enums

* chore(generators): Remove spurious whitespace

* fix(generators): Make provideFunction_ etc. public

  Remove the protected declaration on provideFunction_ and
  FUNCTION_NAME_PLACEHOLDER_ so they can be used from generator
  functions written in TypeScript.

  Not strictly part of #7283, but closely related and required to
  fixing the related issue google/blockly-samples#1785.

* chore(generators): format

(cherry picked from commit d503fbb409)

typings/javascript.d.ts

@@ -4,4 +4,42 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+export enum Order {
+  ATOMIC = 0,            // 0 "" ...
+  NEW = 1.1,             // new
+  MEMBER = 1.2,          // . []
+  FUNCTION_CALL = 2,     // ()
+  INCREMENT = 3,         // ++
+  DECREMENT = 3,         // --
+  BITWISE_NOT = 4.1,     // ~
+  UNARY_PLUS = 4.2,      // +
+  UNARY_NEGATION = 4.3,  // -
+  LOGICAL_NOT = 4.4,     // !
+  TYPEOF = 4.5,          // typeof
+  VOID = 4.6,            // void
+  DELETE = 4.7,          // delete
+  AWAIT = 4.8,           // await
+  EXPONENTIATION = 5.0,  // **
+  MULTIPLICATION = 5.1,  // *
+  DIVISION = 5.2,        // /
+  MODULUS = 5.3,         // %
+  SUBTRACTION = 6.1,     // -
+  ADDITION = 6.2,        // +
+  BITWISE_SHIFT = 7,     // << >> >>>
+  RELATIONAL = 8,        // < <= > >=
+  IN = 8,                // in
+  INSTANCEOF = 8,        // instanceof
+  EQUALITY = 9,          // == != === !==
+  BITWISE_AND = 10,      // &
+  BITWISE_XOR = 11,      // ^
+  BITWISE_OR = 12,       // |
+  LOGICAL_AND = 13,      // &&
+  LOGICAL_OR = 14,       // ||
+  CONDITIONAL = 15,      // ?:
+  ASSIGNMENT = 16,       // = += -= **= *= /= %= <<= >>= ...
+  YIELD = 17,            // yield
+  COMMA = 18,            // ,
+  NONE = 99,             // (...)
+}
+
 export declare const javascriptGenerator: any;