improvement(devtools-view): enable noUncheckedIndexedAccess

[RishhiB]

• enable noUncheckedIndexAccess

// Total: 5 errors in src/replayDocumentDeltaConnection.ts

// File: src/replayDocumentDeltaConnection.ts 
Line 135: error TS18048: 'currentOp' is possibly 'undefined'.
 const currentTimeStamp = currentOp.timestamp;
                            ~~~~~~~~~

Line 141: error TS18048: 'op' is possibly 'undefined'.
 if (op.timestamp === undefined) {
        ~~

Line 145: error TS18048: 'op' is possibly 'undefined'.
 const timeDiff = op.timestamp - currentTimeStamp;
                     ~~

Line 172: error TS2345: Argument of type '(ISequencedDocumentMessage | undefined)[]' is not assignable to parameter of type 'ISequencedDocumentMessage[]'.
 emitter(playbackOps);
          ~~~~~~~~~~~

Line 335: error TS2532: Object is possibly 'undefined'.
 done = controller.isDoneFetch(currentOp, messages[messages.length - 1].timestamp);
                                            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~