Make BRP builtins utilities parse and parse_some public (#22005)

# Objective

Builtin BRP methods make constant use of `parse` and `parse_some` in
parsing utilities. Making them public allows users to use them in their
own code.

## Solution

Make both functions `pub`.

## Testing

I think testing is not necessary, especially since doc strings do not
link anywhere.

Author: Nilirad

crates/bevy_remote/src/builtin_methods.rs

@@ -479,7 +479,7 @@ pub struct BrpQueryRow {
 }
 
 /// A helper function used to parse a `serde_json::Value`.
-fn parse<T: for<'de> Deserialize<'de>>(value: Value) -> Result<T, BrpError> {
+pub fn parse<T: for<'de> Deserialize<'de>>(value: Value) -> Result<T, BrpError> {
     serde_json::from_value(value).map_err(|err| BrpError {
         code: error_codes::INVALID_PARAMS,
         message: err.to_string(),
@@ -488,7 +488,7 @@ fn parse<T: for<'de> Deserialize<'de>>(value: Value) -> Result<T, BrpError> {
 }
 
 /// A helper function used to parse a `serde_json::Value` wrapped in an `Option`.
-fn parse_some<T: for<'de> Deserialize<'de>>(value: Option<Value>) -> Result<T, BrpError> {
+pub fn parse_some<T: for<'de> Deserialize<'de>>(value: Option<Value>) -> Result<T, BrpError> {
     match value {
         Some(value) => parse(value),
         None => Err(BrpError {