insert_if_new does not have a non-panicking variant

[Jondolf]

What problem does this solve or what need does it fill?

#14646 added the insert_if_new command. However, it did not add try_insert_if_new, which is inconsistent and inconvenient. The docs simply link try_insert as the non-panicking variant, even though it is functionally different, as it replaces instead of keeping existing components.

bevy/crates/bevy_ecs/src/system/commands/mod.rs

Lines 952 to 967 in 5243fe6

	/// Adds a [`Bundle`] of components to the entity without overwriting.
	///
	/// This is the same as [`EntityCommands::insert`], but in case of duplicate
	/// components will leave the old values instead of replacing them with new
	/// ones.
	///
	/// # Panics
	///
	/// The command will panic when applied if the associated entity does not
	/// exist.
	///
	/// To avoid a panic in this case, use the command [`Self::try_insert`]
	/// instead.
	pub fn insert_if_new(&mut self, bundle: impl Bundle) -> &mut Self {
	self.add(insert(bundle, InsertMode::Keep))
	}

What solution would you like?

Add try_insert_if_new.