Add Type and More, and the file stream they are built on

Two applications that read a file too big for Data Memory: Type prints one,
More pages it. Both sit on fileStream.asm, which wraps osFileInfo and
osFileBlock into open-and-next so an application walks a file's blocks without
repeating the service calls.

The disk fixture is deliberately awkward: readable.txt crosses several blocks
and carries no zero byte to be mistaken for an end marker, and empty.txt says
that zero blocks is a valid file rather than an error.

These three files were written by ChatGPT, as their headers record.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E2JrLzFvuFX9fgi1LDRjrW

Tests/manifest

@@ -316,6 +316,14 @@ cosmosServices       | CosmOS/Source/cosmos.asm           | run      | cosmosFil
 # notice the file moved - and that one would otherwise pass, since the blocks are still
 # there and still hold the same bytes.
 cosmosStream         | CosmOS/Source/cosmos.asm           | run      | cosmosStream.in    | -     | disks/stream.img
+# A useful application made out of the streaming primitive: print a named text file without
+# requiring it to fit in Data Memory. The fixture crosses block boundaries, includes a full
+# 256-byte block, and also checks empty, missing, and absent filename cases.
+cosmosType           | CosmOS/Source/cosmos.asm           | run      | cosmosType.in      | -     | disks/type.img
+# The same stream with interaction layered on it. Three runs exercise q, a whole screen
+# with Space, and one line with Return. The input is intentionally packed so that the one
+# byte the pager consumes leaves the next shell command immediately behind it.
+cosmosMore           | CosmOS/Source/cosmos.asm           | run      | cosmosMore.in      | -     | disks/type.img
 # The assembler's front end, checked in two pieces before anything is built on it.
 #
 # cosmosSource reads a source file and prints it back. The file crosses a block boundary,
@@ -340,6 +348,8 @@ app-Break            | CosmOS/Apps/Break.asm              | assemble | -
 app-Edit             | CosmOS/Apps/Edit.asm               | assemble | -                  | -
 app-Files            | CosmOS/Apps/Files.asm              | assemble | -                  | -
 app-Stream           | CosmOS/Apps/Stream.asm             | assemble | -                  | -
+app-Type             | CosmOS/Apps/Type.asm               | assemble | -                  | -
+app-More             | CosmOS/Apps/More.asm               | assemble | -                  | -
 # The assembler that runs on the machine, and its parts. Checked on their own so that a
 # failure reads as "it does not assemble" rather than as a broken disk image.
 asm-Asm              | CosmOS/Assembler/Asm.asm           | assemble | -                  | -