wip, factoring out typed-array helpers

src/mol-io/common/simple-buffer.ts

src/mol-io/common/typed-array.ts

src/mol-io/reader/ccp4/parser.ts

src/servers/volume/common/data-format.ts

src/servers/volume/common/file.ts

src/servers/volume/pack/data-model.ts

src/servers/volume/pack/downsampling.ts

src/servers/volume/pack/format.ts

src/servers/volume/pack/format/ccp4.ts

src/servers/volume/pack/format/common.ts

src/servers/volume/pack/format/dsn6.ts

src/servers/volume/pack/sampling.ts

src/servers/volume/pack/writer.ts

src/servers/volume/server/query/compose.ts

src/servers/volume/server/query/data-model.ts

src/servers/volume/server/query/encode.ts

src/servers/volume/server/query/execute.ts