Cleanup repository structure #5898

Job	Run time
Style check	1m 51s
Emit Workflow Info	0s
Build Synlig Release	5m 8s
Build Plugin	5m 5s
Build Synlig (ASAN)	7m 22s
Build tools	10m 35s
Build Package	4m 23s
Verify README Correctness (Installation From Sources)	40m 10s
Large Designs Tests / Black Parrot (ASIC synthesis)	45m 58s
Large Designs Tests / Ibex (Vivado synthesis)	6m 22s
Large Designs Tests / Black Parrot (AMD (Xilinx) FPGA synthesis)	16m 43s
Diff generated BSG Micro Designs tests / Parse and diff BSG Micro Designs	6m 15s
Large Designs Tests / Ibex (F4PGA synthesis)	11m 4s
Large Designs Tests / Opentitan 9d82960888 (synthesis)	28m 27s
Large Designs Tests / Opentitan parsing (full/top-down)	12m 38s
Large Designs Tests / Opentitan (synthesis)	49m 58s
Large Designs Tests / Opentitan parsing (quick)	6m 1s
Large Designs Tests / VeeR-EH1 (synthesis)	5m 7s
Parsing Tests / SystemVerilog Plugin	41m 11s
Parsing Tests / Surelog	31m 30s
Formal Verification Tests / simple	15m 50s
Formal Verification Tests / sv2v	14m 53s
Formal Verification Tests / yosys	11m 45s
Parsing Tests / Summary Generation	1m 29s
Parsing Tests / Generate AST diff	4m 56s
Release Package	0s
Verify README Correctness (Download And Run Release)	0s
	6h 24m 41s

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