Riscv-ctg

- Updated logger to enable logging for API calls.

- Update instruction format of aes32 and sm4 instructions for K extensions.
- Improve the coverage of S-boxes for sm4 instructions by setting overlap = "Y" in byte_count.

- Fix sign of immediate value for branching instructions while filtering.
- Fix instruction generation while result shadowing.

- Update the sample cgf for RV32E
- fix the generation of RV32E Tests

- support for K extension and subextension instructions
- support for comments in coverpoints
- added std_op field in template.yaml to indicate is standard-instruction the pseudo op belongs to.
- added support for parsing nosat in coverpoint which disables the solvers for the current resolution.
- added sample cgf files for rv64ik and rv32ik

- Minor code restructure to support API calls.
- Fixes to include env files in pip package.