perf(fs): improve FileHandle.read performance

[amrbashir]

No description provided.

[github-actions]

Package Changes Through fa69c6c

There are 12 changes which include dialog with patch, dialog-js with patch, positioner with patch, positioner-js with patch, fs with patch, fs-js with patch, http with patch, http-js with patch, shell with patch, shell-js with patch, store-js with minor, store with minor

Planned Package Versions

The following package releases are the planned based on the context of changes in this pull request.

package	current	next
api-example	2.0.2	2.0.3
api-example-js	2.0.0	2.0.1
fs	2.0.1	2.0.2
fs-js	2.0.0	2.0.1
dialog	2.0.1	2.0.2
dialog-js	2.0.0	2.0.1
http	2.0.1	2.0.2
http-js	2.0.0	2.0.1
persisted-scope	2.0.1	2.0.2
positioner	2.0.1	2.0.2
positioner-js	2.0.0	2.0.1
shell	2.0.1	2.0.2
shell-js	2.0.0	2.0.1
store	2.0.1	2.1.0
store-js	2.0.0	2.1.0

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[amrbashir]

converted into draft for now, as I think there is more optimizations I can add

[bWanShiTong]

This breaks compilation for systems target_pointer_width of 16 and 32:

    #[cfg(target_pointer_width = "16")]
    let nread = {
        let nread = nread.to_be_bytes();
        let mut out = [0; 8];
        out[6..].copy_from_slice(&nread);
    };
    #[cfg(target_pointer_width = "32")]
    let nread = {
        let nread = nread.to_be_bytes();
        let mut out = [0; 8];
        out[4..].copy_from_slice(&nread);
    };
    #[cfg(target_pointer_width = "64")]
    let nread = nread.to_be_bytes();

It should be:

    #[cfg(target_pointer_width = "16")]
    let nread = {
        let nread = nread.to_be_bytes();
        let mut out = [0; 8];
        out[6..].copy_from_slice(&nread);
        out
    };
    #[cfg(target_pointer_width = "32")]
    let nread = {
        let nread = nread.to_be_bytes();
        let mut out = [0; 8];
        out[4..].copy_from_slice(&nread);
        out
    };
    #[cfg(target_pointer_width = "64")]
    let nread = nread.to_be_bytes();