Fix Outdated Redstone Conduit Signal

[WaitingIdly]

changes in this PR:

• when changing Redstone Conduit colors, set the old color to have a signal of 0, which prevents a "ghost signal" from persisting in the conduit network for the old color (default: true).

related issues: SleepyTrousers/EnderIO-1.5-1.12#5558

[what-the-diff]

PR Summary

• New Feature Added
  A feature has been introduced that allows the outdated signal to be cleared from the Redstone Conduit. This can take place when changing colors in the GUI, improving user experience and signal clarity.

• README.md Updated
  To keep users informed about the new update, we've documented the Redstone Conduit feature in the changelog section of the README file.

• Modification in UTConfigMods.java
  We've introduced a boolean configuration called utClearRedstoneConduitChange in the UTConfigMods.java file. This new configuration will handle the functionality related to clearing outdated signals, but note that this would require a restart to take effect.

• UTMixinLoader.java Updated
  The new configuration has been integrated into the mixin loader (in UTMixinLoader.java) to ensure the new feature is applied whenever it is enabled.

• Creation of UTInsulatedRedstoneConduitMixin.java
  We've created a new mixin class called UTInsulatedRedstoneConduitMixin.java. The purpose of this class is to implement the logic necessary for removing the old signal strength when the input signal color is changed.

• Mixin Config File Created
  The addition of mixins.enderio.redstoneconduit.json registers the new mixin for managing alterations in the Redstone Conduit. This aids in structured management of the newly added feature.