Refactor all Shell ast related code to its own directory (ideally being mostly self contained)

[angelhof]

No description provided.

[github-actions]

OS:ubuntu-20.04
Tue Feb 21 20:02:59 UTC 2023
intro: 2/2 tests passed.
interface: 39/39 tests passed.
compiler: 54/54 tests passed.
agg: 109/109 tests passed.

[github-actions]

OS = Debian 10
CPU = Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
Ram = 15752
Hash = 5e05bef
Kernel= Linux 4.15.0-197-generic x86_64

benchmark	tests	passed	failed	untested	unresolved	unsupported	not_in_use	other_status
posix	494	375	41	31	6	40	1	0
intro	2	2	0	0	0	0	0	0
interface	39	39	0	0	0	0	0	0
compiler	54	54	0	0	0	0	0	0
aggregator	109	109	0	0	0	0	0	0

[github-actions]

OS:ubuntu-20.04
Tue Feb 21 20:08:10 UTC 2023
intro: 2/2 tests passed.
interface: 39/39 tests passed.
compiler: 54/54 tests passed.
agg: 109/109 tests passed.

[github-actions]

OS = Debian 10
CPU = Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
Ram = 15752
Hash = dc73bd8
Kernel= Linux 4.15.0-197-generic x86_64

benchmark	tests	passed	failed	untested	unresolved	unsupported	not_in_use	other_status
posix	494	375	41	31	6	40	1	0
intro	2	2	0	0	0	0	0	0
interface	39	39	0	0	0	0	0	0
compiler	54	54	0	0	0	0	0	0
aggregator	109	109	0	0	0	0	0	0

[github-actions]

OS:ubuntu-20.04
Tue Feb 21 22:58:34 UTC 2023
intro: 0/2 tests passed.
interface: 27/39 tests passed.
compiler: 18/54 tests passed.
agg: 109/109 tests passed.
demo-spell.sh are not identical
hello-world.sh are not identical
test4 are not identical
test6 are not identical
test8 are not identical
test10 are not identical
test13 are not identical
test16 are not identical
test17 are not identical
test_set_e are not identical
test_unparsing are not identical
test_set_e_3 are not identical
test_new_line_in_var are not identical
test_cmd_sbst2 are not identical
grep.sh are not identical
grep.sh are not identical
minimal_sort.sh are not identical
minimal_sort.sh are not identical
minimal_grep.sh are not identical
minimal_grep.sh are not identical
topn.sh are not identical
topn.sh are not identical
wf.sh are not identical
wf.sh are not identical
spell.sh are not identical
spell.sh are not identical
shortest_scripts.sh are not identical
shortest_scripts.sh are not identical
alt_bigrams.sh are not identical
alt_bigrams.sh are not identical
deadlock_test.sh are not identical
deadlock_test.sh are not identical
double_sort.sh are not identical
double_sort.sh are not identical
no_in_script.sh are not identical
no_in_script.sh are not identical
for_loop_simple.sh are not identical
for_loop_simple.sh are not identical
minimal_grep_stdin.sh are not identical
minimal_grep_stdin.sh are not identical
micro_10.sh are not identical
micro_10.sh are not identical
sed-test.sh are not identical
sed-test.sh are not identical
tr-test.sh are not identical
tr-test.sh are not identical
grep-test.sh are not identical
grep-test.sh are not identical
ann-agg.sh are not identical
ann-agg.sh are not identical

[github-actions]

OS:ubuntu-20.04
Tue Feb 21 23:12:13 UTC 2023
intro: 2/2 tests passed.
interface: 39/39 tests passed.
compiler: 54/54 tests passed.
agg: 109/109 tests passed.

[github-actions]

OS = Debian 10
CPU = Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
Ram = 15752
Hash = 6e21f2b
Kernel= Linux 4.15.0-197-generic x86_64

benchmark	tests	passed	failed	untested	unresolved	unsupported	not_in_use	other_status
posix	494	375	41	31	6	40	1	0
intro	2	2	0	0	0	0	0	0
interface	39	39	0	0	0	0	0	0
compiler	54	54	0	0	0	0	0	0
aggregator	109	109	0	0	0	0	0	0