syspagen: add tool to generate syspage based on plo's scripts

[HBuczynski]

Description

syspagen allows to generate syspage binary file or to add syspage blob into kernel image based on plo's scripts.

RTOS-147

Motivation and Context

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

How Has This Been Tested?

• [ ] Already covered by automatic testing.
• [ ] New test added: (add PR link here).
• [ ] Tested by hand on: (imx6ull).

Checklist:

• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing linter checks and tests passed.
• [ ] My changes generate no new compilation warnings for any of the targets.

Special treatment

• [ ] This PR needs additional PRs to work (list the PRs, preferably in merge-order).
• [ ] I will merge this PR by myself when appropriate.

[HBuczynski]

@agkaminski, @nalajcie I have applied almost the majority of Your suggestions/comments. If I haven't made changes, I have left an approptiate comment.

[nalajcie]

please change also commit message syspagegen -> syspagen if You can

[HBuczynski]

please change also commit message syspagegen -> syspagen if You can

Done