Rework plugin system

[xxDark]

What's new

Plugin system is now reworked to act as a graph with dependencies.
Each plugin is loaded in its own class loader controlled by plugin manager.
Plugin loaders no longer participate in plugin loading, but only prepare plugins to be loaded.
To load plugins from a directory or any arbitrary source, PluginDiscoverer may be implemented.

TBD

• Plugin unloading
• Migrate to JGraphT
• Load plugins from the directory when Recaf starts. IMO the code to do that should be moved to main class and not be in @PostConstruct with test env hack.
• Think if we should even have the concept of "startup" plugins. There probably needs work to be done to properly cleanup plugins when they are unloaded.

[github-actions]

Unit test results

 43 files   - 10   43 suites   - 10   18s ⏱️ -7s
341 tests  - 33  334 ✅  - 34  6 💤 ±0  1 ❌ +1 
363 runs   - 33  356 ✅  - 34  6 💤 ±0  1 ❌ +1 

For more details on these failures, see this check.

Results for commit 98b54f8. ± Comparison against base commit 9653c52.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Attention: Patch coverage is 56.29139% with 132 lines in your changes are missing coverage. Please review.

Project coverage is 70.11%. Comparing base (9653c52) to head (51902e9).

❗ Current head 51902e9 differs from pull request most recent head 98b54f8. Consider uploading reports for the commit 98b54f8 to get more accurate results

Files	Patch %	Lines
...tware/coley/recaf/services/plugin/PluginGraph.java	45.20%	34 Missing and 6 partials ⚠️
...ley/recaf/services/plugin/zip/ZipPluginLoader.java	61.53%	20 Missing and 10 partials ⚠️
...y/recaf/services/plugin/PluginClassLoaderImpl.java	33.33%	21 Missing and 3 partials ⚠️
...oley/recaf/services/plugin/zip/ZipArchiveView.java	41.66%	13 Missing and 1 partial ⚠️
...are/coley/recaf/services/plugin/zip/ZipSource.java	53.84%	3 Missing and 3 partials ⚠️
...y/recaf/services/plugin/zip/ZipPreparedPlugin.java	61.53%	5 Missing ⚠️
...ley/recaf/services/plugin/PluginContainerImpl.java	55.55%	4 Missing ⚠️
...oley/recaf/services/plugin/BasicPluginManager.java	80.00%	2 Missing and 1 partial ⚠️
...a/software/coley/recaf/util/io/PathByteSource.java	0.00%	2 Missing ⚠️
...a/software/coley/recaf/plugin/PluginException.java	0.00%	1 Missing ⚠️
... and 3 more

Additional details and impacted files

@@             Coverage Diff              @@
##               dev4     #780      +/-   ##
============================================
- Coverage     70.32%   70.11%   -0.21%     
- Complexity     2992     3012      +20     
============================================
  Files           348      352       +4     
  Lines         15607    15763     +156     
  Branches       1776     1799      +23     
============================================
+ Hits          10975    11052      +77     
- Misses         3773     3843      +70     
- Partials        859      868       +9     

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