Big project dir refactor

* split into multi member workspace in preparation for a no_std core
* env and posix stuff neatly crammed into a seperate shell project
* some pokes at interactive-devel.f
* updated ci
* removed 'l' shortcut for 'load' and update docs
* remove out of date readme content
* updated tests
* more sensible cond implementation and extra tests
* substr stdlib function with tests

Signed-off-by: Ava Affine <ava@sunnypup.io>

.gitlab-ci.yml

@@ -6,25 +6,30 @@ stages:
   - test
   - release
 
-compile-with-posix-features:
+compile-shell-with-posix-features:
   stage: build
   script:
-    - cargo build
+    - cargo build -p flesh-shell -F posix
 
-compile-without-posix-features:
+compile-shell-without-posix-features:
   stage: build
   script:
-    - cargo build --no-default-features
+    - cargo build -p flesh-shell --no-default-features
 
-compile-implicit-load:
+compile-core:
   stage: build
   script:
-    - cargo build -F implicit-load
+    - cargo build -p flesh-core
  
-unit-tests:
+unit-test-shell:
   stage: test
   script:
-    - cargo test
+    - cargo test -p flesh-shell
+
+unit-test-core:
+  stage: test
+  script:
+    - cargo test -p flesh-core
 
 userlib-tests:
   stage: test
@@ -34,7 +39,7 @@ userlib-tests:
 prepare-release:
   stage: release
   script:
-    - cargo build -F implicit-load --release
+    - cargo build --release
     - |
       tar -czf flesh-$CI_COMMIT_TAG.tar.gz \
         --xform='s,target/release/,,' \