Port command pb/B to new shell

[PeiweiHu]

Your checklist for this pull request

• I've read the guidelines for contributing to this repository
• I made sure to follow the project's coding style
• I've documented or updated the documentation of every function and struct this PR changes. If not so I've explained why.
• I've added tests that prove my fix is effective or that my feature works (if possible)
• I've updated the rizin book with the relevant information (if needed)

Detailed description

• port command pb/B to new shell

Test plan

CI is green.

Closing issues

partially address #1590

[XVilka]

Unnecessary newline:

[XX] db/cmd/cmd_0 pB 0
RZ_NOPLUGINS=1 /usr/bin/rizin -escr.utf8=0 -escr.color=0 -escr.interactive=0 -N -Qc 'pB 0' bins/elf/analysis/hello-arm32
-- stdout
--- expected
+++ actual
@@ -1,0 +1,1 @@
+
[XX] db/cmd/cmd_0 pb 0
RZ_NOPLUGINS=1 /usr/bin/rizin -escr.utf8=0 -escr.color=0 -escr.interactive=0 -N -Qc 'pb 0' bins/elf/analysis/hello-arm32
-- stdout
--- expected
+++ actual
@@ -1,0 +1,1 @@
+

Apart from that, looks good.

[ret2libc]

Just those smaller things, but it's ok except them.