Object Model Support

[sequencer]

In order to feed Documentation to Typst template, as well as PnR scripts. T1 will use Object Model in MLIR.
The OM information will be stored via Property API in the OM IR, there will be an additional CIRCT plugin to consume these. this is the general roadmap:

• use Property API to annotate all VRF SRAM path, see make PropertyType public, add Path factory method chisel#3516
• use OM to annotate all metadata used for documentations.
• provide a flow to read from MLIR to generate floorplan and SDC constraint for FPGA

Here are OM I can think about:

- T1SubsystemOM
  - RocketCore
    - I$
    - D$
    - ISA
  - PLIC
    - Interrupts
  - CLINT
    - Interrupts
  - MemorySubsystem
    - Region0
    - Region1
    - ...
  - T1
    - ISA
    - uArch