AK: Rename Stream::{read,write} to Stream::{read_some,write_some}

Similar to POSIX read, the basic read and write functions of AK::Stream
do not have a lower limit of how much data they read or write (apart
from "none at all").

Rename the functions to "read some [data]" and "write some [data]" (with
"data" being omitted, since everything here is reading and writing data)
to make them sufficiently distinct from the functions that ensure to
use the entire buffer (which should be the go-to function for most
usages).

No functional changes, just a lot of new FIXMEs.

AK/MemoryStream.cpp

@@ -43,7 +43,7 @@ ErrorOr<void> FixedMemoryStream::truncate(size_t)
     return Error::from_errno(EBADF);
 }
 
-ErrorOr<Bytes> FixedMemoryStream::read(Bytes bytes)
+ErrorOr<Bytes> FixedMemoryStream::read_some(Bytes bytes)
 {
     auto to_read = min(remaining(), bytes.size());
     if (to_read == 0)
@@ -79,7 +79,7 @@ ErrorOr<size_t> FixedMemoryStream::seek(i64 offset, SeekMode seek_mode)
     return m_offset;
 }
 
-ErrorOr<size_t> FixedMemoryStream::write(ReadonlyBytes bytes)
+ErrorOr<size_t> FixedMemoryStream::write_some(ReadonlyBytes bytes)
 {
     VERIFY(m_writing_enabled);
 
@@ -94,7 +94,7 @@ ErrorOr<void> FixedMemoryStream::write_entire_buffer(ReadonlyBytes bytes)
     if (remaining() < bytes.size())
         return Error::from_string_view_or_print_error_and_return_errno("Write of entire buffer ends past the memory area"sv, EINVAL);
 
-    TRY(write(bytes));
+    TRY(write_some(bytes));
     return {};
 }
 
@@ -118,7 +118,7 @@ size_t FixedMemoryStream::remaining() const
     return m_bytes.size() - m_offset;
 }
 
-ErrorOr<Bytes> AllocatingMemoryStream::read(Bytes bytes)
+ErrorOr<Bytes> AllocatingMemoryStream::read_some(Bytes bytes)
 {
     size_t read_bytes = 0;
 
@@ -140,7 +140,7 @@ ErrorOr<Bytes> AllocatingMemoryStream::read(Bytes bytes)
     return bytes.trim(read_bytes);
 }
 
-ErrorOr<size_t> AllocatingMemoryStream::write(ReadonlyBytes bytes)
+ErrorOr<size_t> AllocatingMemoryStream::write_some(ReadonlyBytes bytes)
 {
     size_t written_bytes = 0;