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* remove out of date readme content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>

core/src/lib.rs

@@ -0,0 +1,42 @@
+/* Flesh: Flexible Shell
+ * Copyright (C) 2021 Ava Affine
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+//#![no_std]
+
+mod eval;
+mod lex;
+mod segment;
+mod stl;
+mod sym;
+mod error;
+
+pub mod ast {
+    pub use crate::eval::eval;
+    pub use crate::lex::lex;
+    pub use crate::segment::{Ctr, Seg, Type};
+    pub use crate::sym::{Args, SymTable, Symbol, UserFn, ValueType};
+    pub use crate::error::{Traceback, start_trace};
+}
+
+pub mod stdlib {
+    pub use crate::stl::{
+        static_stdlib,
+        CFG_FILE_VNAME,
+        decl::STORE_DOCSTRING,
+        decl::store_callback,
+    };
+}