Prevent premature launches: disable continuous indexing on intake and tune beam-break pulse

[mechaniaccc]

Motivation

• Intake was still driving the indexer continuously while the left trigger was held, which caused rings to be advanced into the shooter and sometimes launched prematurely.
• The beam-break compensation logic needed tighter caps and a proper subsystem implementation so pulsed indexing behaves predictably and callers can query beam-break state.

Description

• Updated TeleOp binding to stop continuous indexer drive during normal intake by changing the left-trigger IntakeCommand call to pass indexPower = 0 instead of 0.6 (file: CommandTeleOp.java).
• Tuned IntakeCommand to reduce the beam-break feed pulse to 180 ms, added separate pulse power caps INDEX_FEED_PULSE_POWER_INTAKE = 0.35 and INDEX_FEED_PULSE_POWER_ACTIVE = 0.6, and implemented getIndexPulsePower() which returns the appropriate capped pulse power (file: IntakeCommand.java).
• Restored BeamBreakSubsystem as a proper SubsystemBase implementation with isBeamBreakOn(...) and getVoltage() methods and removed the embedded debug opmode (file: BeamBreakSubsystem.java).

Testing

• Verified code locations and the updated binding with rg -n "leftTrigger\.whileActiveContinuous|new IntakeCommand\(feeder, \(\) -> beamBreak\.isBeamBreakOn\(" TeamCode/src/main/java/org/firstinspires/ftc/teamcode/CommandTeleOp.java, which found the modified binding.
• Attempted to compile with ./gradlew :TeamCode:compileDebugJavaWithJavac --console=plain, but Gradle wrapper download was blocked by the environment proxy (HTTP/1.1 403 Forbidden), so a full compile could not be completed in this environment.

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Codex Task