Tools: Extract resources object and implement incremental scan (original: #7183)

[makimat]

Description

I found that the resource object being part of the tool chain, and depending on
tool chain infrastructure was a bit odd, so I extracted resources from tool
chains. The resulting code is quite a bit more clear in it's purpose and can be a
tad smaller (extra documentation and formatting excluded). I made the resources
object fully incremental, meaning that the scan stops early otfen for targets,
toolchains and features, and can easily pick itself back up where it left off.

...

Pull request type

[ ] Fix
[x] Refactor
[ ] Target update
[ ] Functionality change
[ ] Docs update
[ ] Test update
[ ] Breaking change

[softagram-bot]

Softagram Impact Report for pull/19 (head commit: 750a2ac)

Target: K64F

⭐ Visual Overview

Changed elements and changed dependencies.


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⭐ Change Impact

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