Xtensa - Plugin improvements

[XVilka]

Currently Xtensa support is pretty basic and is based on the binutils code.

• Implement Xtensa in Capstone: auto-sync progress tracker: Refactor and implement architectures capstone-engine/capstone#2015
• Port Xtensa plugin to the new capstone-based one
• Port Xtensa plugin from ESIL to RzIL: ESIL to RZIL conversion #2080
• Add more file-based tests
• Implement FLIX? xtensa FLIX support NationalSecurityAgency/ghidra#6342
• Support XTensa in rz-ghidra: Xtensa - Plugin improvements #4383

[ashiskumarnaik]

@XVilka please assign this

[Rot127]

Done. Does this mean you would also like to implement the Capstone module?
In this case please let me know. I can/should give you some guidance for this.

[Rot127]

@DanielAW As far as I am aware of, you are the only one who did recently public work on Xtensa based firmware. Was there any quality of live improvements you wished to have, when working on it with other RE frameworks (besides the LITBASE problem you mentioned in your talk)?
Adding your remarks to the list above, would be of great value.